How to diagnose and repair onboard RAM memory issues -Lenovo laptop coming on with no picture repair

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  • Опубликовано: 3 фев 2025

Комментарии • 217

  • @afb9999
    @afb9999 Год назад +87

    Usually there's a resistor you can remove or change near the cpu to disable the onboard memory and use only dimm but you'll need schematics and board view to find it if reflow doesn't work

    • @laptopDoctorKZN
      @laptopDoctorKZN Год назад +4

      Lenovo carbon gen2. Common ram gets bad. But difficult because no dim slots

    • @caprairinucai
      @caprairinucai Год назад +2

      Thank you :)

    • @Sensui_Shinobu
      @Sensui_Shinobu Год назад +1

      @@laptopDoctorKZN here reballing all or changed all chips for a new.

    • @yellouu_theree
      @yellouu_theree Год назад

      ​@@Sensui_Shinobuwould you know is it posible to salvage chips that are same spec or even even better spec , from dimm module ?

    • @TheAlfajuls
      @TheAlfajuls Год назад

      @@yellouu_theree i´m sure that i saw Dosdude1 doing that to a macbooc air

  • @retromodify
    @retromodify Год назад +22

    A few days ago, I had an Acer laptop from a customer with faulty onboard RAM. They were getting like over 100 degrees, crazy! I tried reflowing and nothing worked. I took them off but keep in mind, the laptop will still not work because the bios will still search for the onboard RAM, because it's programmed that way. The solution is to mod the bios, and disable the onboard RAM. Then you can just plug in a normal RAM stick and you are good to go :D

    • @tomycomputerservice
      @tomycomputerservice Год назад

      How to disable ram by bios sir?

    • @Sensui_Shinobu
      @Sensui_Shinobu Год назад +1

      @@tomycomputerservice schematics-boardview, be awared a Onboard ram be Conected Directly to CPU, are 50-50 ram or Cpu Conection.

    • @tomycomputerservice
      @tomycomputerservice Год назад +5

      @@Sensui_Shinobu schematic-bv is move resistor method for enable/disable config. My question is how to disable ram by bios without move any resistor

    • @charanebot6423
      @charanebot6423 Год назад +1

      What about a case where the laptop has no external slot to an additional Ram module?

    • @tomycomputerservice
      @tomycomputerservice Год назад

      @@charanebot6423 replace ram chips

  • @osmevi
    @osmevi 7 месяцев назад +1

    Sir I bought a rework station 1 year ago, still in its box, I have a 55" TV not working 2 years ago (display issues) I had some time and said... I'll watch some videos to know how to use it, yours was the second video and a light bulb turn on over my head! I open the TV, take out the main board, I reworked the 4 ram memories and the processor too, put thermal grease, assemble all back, and I'm watching my TV all excited! Thanks for sharing your knowledge!

  • @electronicrepairservice2020
    @electronicrepairservice2020 Год назад +20

    Wow, I can't help but wonder what it was like to figure out a fault like this for the first time.😤 Nice to know what to look for based on experience, it could be a big time & aggravation saver. 👍 Great lesson!!

  • @FrankSmit-rf4bg
    @FrankSmit-rf4bg 6 месяцев назад +2

    You are a great teacher. It's video's like yours that give me the confidence to go out en try this for myself.

  • @kassdiarrassouba7031
    @kassdiarrassouba7031 Год назад +1

    Bonsoir Collègue je vous observe depuis la Côte Ivoire, vous êtes génial, je vous tire mon chapeau

  • @windycl111
    @windycl111 Год назад +18

    when I see you put up a video it's like Christmas

    • @masterliu1892
      @masterliu1892 Год назад

      I agree, with clear thinking and clear expression. The material is also very useful for learning. It's a very good video.

    • @harrypromise5254
      @harrypromise5254 Год назад

      Yup, exactly 😊

  • @rickoneill4343
    @rickoneill4343 Год назад +6

    Can't wait to see your microscope in 4k. We appreciate all the hard work you do!

  • @nightwaves3203
    @nightwaves3203 Год назад +1

    Smart efficient and quick. Best I've seen on the internet. Wish you worked on transceivers and amplifiers. Keep up the fantastic work.

  • @orion310591RS
    @orion310591RS Год назад +5

    5:35 - Its obvious that marks started disappearing on left most chips. Meaning high temperature. Fluctuation in temperature is what makes solder cracks.
    17:33 - There probably have been multiple problems. It changed its behavior after reflowing first 2 chips, so something was fixed/changed. After reflowing second group it started working, and was functional 100%.
    You didnt reflow only second group to be sure its last one. Simple method of deduction.
    Good method and demonstration but I think its better to reflow to be sure, sometimes can happen that pushing will not help but reflow will help. Sometimes you have to remove chip to see that solder ball is missing.

  • @graundd
    @graundd Год назад

    Sorin esti tare , mult respect, tot romanii le dau clasa la straini =)) , multa sanatate

  • @patriciaoudart1508
    @patriciaoudart1508 Год назад +1

    update. Amazing that could be a sold issue. Happy to have brought an Air Solder !🙏🧡💚🤗 thanks to your videos !. I will try that on one dimm that were not working, causing blue screen and freeze on a working XP laptop. I just changed Battery unmounting all the motherboard, and I fixed the second issue just by taking out the second ram memory, I added just previously.
    I will see when having time, but an interesting subject for me, that's an issue I had lot of times having lot memory pieces, I generally change the not working one. Happened me few days ago, but not tried to repare the Ram part. Will update this comment if necessary! Thanks🙏💚👍

    • @unvox7127
      @unvox7127 Год назад

      gladly waiting for the updates dude

  • @fredericomacias5547
    @fredericomacias5547 Год назад

    Great tip, Sorin! That's why I bought a laptop with no RAM soldered in

  • @caprairinucai
    @caprairinucai Год назад +1

    I think same problem my Vaio have.I'll try this trick tomorrow.Thank you everyone for sharing your knowledge :)

  • @PedroFNMartins
    @PedroFNMartins Год назад +1

    Your channel it's really good for learning repair eletronics. It's not like other channels that can only repair shorted components using a thermal camera. Your vids give a lot of different cases of faulty devices which it's very good for learning. I must say that I have learned a lot from yours vids and my skill to repair stuff has increased a lot. Thx for your vids and keep the good work.

  • @MaverickM1
    @MaverickM1 Год назад +2

    Hi Sorin. Followed some other electronic repair youtubers earlier but they started to speak about their customersin a quite unacceptable style so I left those superhuman channels. It seems, there are two proper guys left where this problem never occurs. You are one of the two. Please, keep your style, show your success and also your failures, keep acting like this. Great channel with great quality content we can learn from. Greetings from Hungary.

  • @johannesdesloper8434
    @johannesdesloper8434 Год назад +4

    Awesome repair! magnificent diagnostic.

    • @masterliu1892
      @masterliu1892 Год назад

      It is true that he has done a great job in this area, and I really want to have the opportunity to communicate with him.

  • @ACOnetwork
    @ACOnetwork Год назад

    In the past I came arround a laptop where if fan was not connected laptop wont turn on... so maybe the left chip was the issue.
    I was cringing when you flexed main board so much but everything worked out on the end 😁. Good video, thx.

  • @mugabirapaul8653
    @mugabirapaul8653 Год назад +1

    Thanks for your great idea you have shared with us master
    which type of Reballing flux have you used

  • @nedbeard
    @nedbeard Год назад +11

    The flex in that laptop is crazy! most probably the cause of the RAM error. That or someone vented on the keyboard and thumped it. Reflowing the RAM chips can also be a nightmare on Lenovos because of the brown glue they insist on using. I've seen a few newer HPs with the outer pins on the RAM sockets loose just due to pressure from typing. Modern laptops have poor structural integrity and break with little effort but people want thin tech and will have to pay the price in longevity.

    • @patriciaoudart1508
      @patriciaoudart1508 Год назад +3

      🌄🧡💚crazy, agree!☺️ Tablets are thin but have not the keyboard whole with poor plastic on it. The screen is the best way to put beside the motherboard like tablets, I have an octocore, and very easy to go inside. Perhaps in future, that's an evolution to promote, making the Keyboard a separate thing, with one piece screen and motherboard, even on a 15" or a 19", and why not touch screen. I uses old laptops for music so I have All generations ones, because music hardware's are not updated since window seven sound system, and related to graphic cards, so I can see the evolution opening them, some were iron bunkers, but now for sure, they seems made like a smartphone mother board.🤗 Quick to destroy a solder layer access .

    • @twx8626
      @twx8626 Год назад +5

      10-15 years ago the board was close to the bottom. with bending protection. Today it is close to the keyboard, all the typing on the keyboard is slowly destroying the motherboard. Fans are getting clogged more small ventilation holes

  • @lenshibo
    @lenshibo 11 месяцев назад

    This is great advice! Thank you for sharing, ill be sure to remember this for future repairs.

  • @marcwieber6989
    @marcwieber6989 16 дней назад +1

    Great Video. If I have memory failures in the Lenovo Diagnostic Software, can I relate the adress to the actuall chip on the board?

  • @stefan7231
    @stefan7231 Год назад

    Great content and thank you for everything. I've learned so much from this channel that no school can teach me.
    Just one advice, don't open laptops on the corners. That puts all the force on one hinge and can weaken or even break the hinge(don't ask me how I know) :D

  • @KOOS-EDTSOF
    @KOOS-EDTSOF Год назад

    THANK YOU VERY MUCH FOR THE EXPLANATION OF THE MEMORY PROBLEM A QUESTION HOW COULD YOU BERIFY IT IF WHEN YOU PRESENT NOTHING AS SHOWN IN THE VIDEO THANK YOU VERY MUCH

  • @RandomHacks
    @RandomHacks Год назад +8

    A little tip, if the chips are actually defective it is cheaper and safer to buy a RAM module remove the chips, reball and solder on the board rather than buying the chips themselves. I bought an 8gb ddr4 ram module for 15usd from aliexpress to fix the onboard memory of a laptop, If I had bought just the chips it would be several times more expensive and I could possibly end up with fake/faulty chips. Just make sure the chips on the module use the same package and preferably have the same specs as the ones on the board.

  • @geekjit215
    @geekjit215 Год назад

    I am watching this from the exact same laptop. To be precise, mine carries the model no. Ideapad C340-14API (Ryzen 5 3500U, 1 TB SSD, 14 inch IPS with touch, 8 GB RAM-I have upgraded to 20 GB - 4 GB onboard and 16 GB module). My unit came with Samsung memory though (both the onboard and the expansion as well). 3.5 years so far and still going strong.

  • @VenkatesanS
    @VenkatesanS Год назад +4

    It would be helpful to see the points of voltage measures in zoom position especially for new bee.

  • @Trustsimo07
    @Trustsimo07 Год назад

    a new issue, first time to see that. good job 👍👍 . Another trick, a RAM soldered on the board to make life harder !

  • @diyfixtool830
    @diyfixtool830 Год назад

    This video helped me a lot, it deserves likes

  • @adamgrant1787
    @adamgrant1787 Год назад

    Watching this video makes me glad my newer gaming laptop from 2021 has two memory slots if the memory goes bad it's a quick fix.

  • @crawfordpritchard9604
    @crawfordpritchard9604 Год назад +2

    Nice 4k video, love it!👍

  • @quadrimustopha7288
    @quadrimustopha7288 Год назад

    For me
    I will first detach the battery from the board before anything,
    I cannot still believe that seems like a magic to me,
    Sorin please I want to come to you,
    I needed to inherit all these knowledge from you..........

  • @tehnoelektronikloznica7119
    @tehnoelektronikloznica7119 Год назад

    My expirience is that repair will not last for long. You must reball all 4 chips.
    You are very good!

  • @lee98210
    @lee98210 Год назад +4

    Can you test again remove the 2nd fan? It could be the system detected no 2nd fan plug in and refuse to turn on, which also explain why it also refuse to work when you press your finger on the same chip as before.

  • @srinivasraomangipudi7271
    @srinivasraomangipudi7271 Год назад +2

    I like the way you say "thingy"

  • @MAXSHNC
    @MAXSHNC 7 месяцев назад

    You are Unbelievable, very well done, how many degrees have you set with hotair?

  • @MnemonicCarrier
    @MnemonicCarrier Год назад

    Magic! Amazing! I've always been fearful of soldered RAM, but not anymore!!! 🤣

  • @shkelqimloki683
    @shkelqimloki683 Год назад

    Great job man you are wonderful as allways

  • @xx3868
    @xx3868 Год назад

    LOVE this channel and everything he does, so much better than all the other channels BUT........ just have one worry on "cooling Pads" um. when you pull up a reflow temp profile for a chip, it gives the time to heat gradually UP to temp but makes it very clear to pull nozzle away SLOWLY to cool not shock the chip. So is fast cooling with a pad will cause fractures soon of the balls? instead of letting it just cool for 10 mins then test? Are the cooling pads undoing all of Sorens great work and will fail again instead of long tern repair?

  • @gerardsunderaj1420
    @gerardsunderaj1420 Год назад

    Your 4K video is fantastic!

  • @garypoplin4599
    @garypoplin4599 Год назад

    18:12 - I’m impressed with the screwdriver you’re using. What’s the model you’re using? It sounds like it has torque capabilities. When I search for such, I find a deluge of choices.

  • @scroopynooperz9051
    @scroopynooperz9051 Год назад +1

    This man is an electronics whisperer 😂 it's like the components speak to him.
    Us mere mortals do not vibrate at this same frequency lol

    • @masterliu1892
      @masterliu1892 Год назад +1

      Friend, practice makes perfect. As long as you study hard, you can become a master like him. All the masters came from apprentices.

  • @2368rafa
    @2368rafa Год назад

    Hello Sorin, as always a great professional, and with incredible knowledge in electronics, and also your proven effectiveness in all the repairs that you teach us. Too bad you're not around (I live in Spain - Granada) to have a coffee with you and say hello

    • @neosandi6
      @neosandi6 Год назад

      become patreon and pay him a coffie

  • @jamesthomas2417
    @jamesthomas2417 Год назад

    Sorin as usual good fix , I suppose the moral of the story is just reflow all chips . thanks for your time Jim

  • @lucataszarek8782
    @lucataszarek8782 Год назад

    Hello🤝nice tip i have laptop with same problem all voltage present but no post thenqu for lesion 👍👍👍👍👍👏👏👏👏👏👋👋👋👋👋👋

  • @jerichowall8185
    @jerichowall8185 Год назад

    Yep, getting some of these on board ram issues with Lenovo notebooks recently

  • @rajasekhartechinfo
    @rajasekhartechinfo 3 месяца назад

    Very nice sir really good job

  • @wares9288
    @wares9288 Год назад

    Thank you so much Sir Sorin

  • @pp3v42_g3h
    @pp3v42_g3h Год назад +1

    Good error finding, in my experience reflow doesn't work, lead free pads get oxidized and the flux can't get to the bottom of the chip, only at the board, so solder won't stick to the chip. Reballing solves the problem all the time (if not the chip has ripped pads). Leaded balls and 90x90 stencil is the best, reballing 4 ram chips take 10 minutes and jobs won't come back dead.

  • @truegod4u
    @truegod4u Год назад

    very nice,how long laptop gonna work after reflow?

  • @ABU_ZAHRA001
    @ABU_ZAHRA001 Год назад

    you are excellently good. I am looking forward to contacting you in personal to learn more from you.

  • @lalrinchhanayoungdj6008
    @lalrinchhanayoungdj6008 7 месяцев назад

    Hello sir, Can you tell me which flux (for reflow) are you using..?? This video

  • @ocayaro
    @ocayaro 9 месяцев назад +2

    Once upon a time, computers beeped codes that immediately told what’s what.

  • @KeithChildress
    @KeithChildress 5 месяцев назад

    What heat gun and flux (rosin) do you recommend?

  • @adz300107
    @adz300107 Год назад

    Hey Sorin, I wanted to play along in diagnosing the fault but I already know what it is because I saw the title of the video. Is it possible to list only the symptoms in the title or do you need to put the cause of fault there also in order to get views?

  • @WilliamSiansala-k7t
    @WilliamSiansala-k7t Год назад

    You have exhibited a great skill in testing on board ram, how did you acquire those skills

  • @kevinarturoramirezzavalza1708
    @kevinarturoramirezzavalza1708 Год назад

    it looks great, but i wonder if it's possible to increase the ram by soldering new ram memories? i hate the new laptops without ram slot

    • @orange_tweleve
      @orange_tweleve 8 месяцев назад +1

      Technically , it should work if you get the same ram type with thr same pinout but larger size. We do it on microcontrollers by swapping out the spi rams or spi flash memory for larger ones. But you can only do that if the laptop already has another variant that has the larger chip. If not its unlikely thr larger size to be detected or even made use of in the laptop. A similar thing I saw was upgrading memory on iphones where the emmc is replaced with a larger one. If that worked , then the ram definitely should imo. But those phones did have the larger memory versions by retail too.

  • @FVEBlog
    @FVEBlog Год назад +1

    It looks much better in 4k. The clip is more detailed. 😀

  • @handleitnow
    @handleitnow Год назад

    Do you think it didn't boot because the fan was not connected? Thanks for sharing!

  • @ArnCital
    @ArnCital Год назад

    I just discovered that memtest86+ has problems and I encountered some with my computer. I also discovered that my desktop will run with one stick of RAM instead of the recommend pair. I had 2x8GB installed and it only saw 8GB. I cleaned the contacts and reseated the RAM and the computer saw both chips. memtest86 also only saw 1 chip until the cleaning and reseating. Online research shows issues with memtest86 and multiple-core processors. 16GB was OK but I sometimes like to run several virtual box instances so need the memory. RAM for a desktop is cheap and I further upgraded to 32GB. Do a search for memtest86 freezes or hangs for more information.

  • @laptopDoctorKZN
    @laptopDoctorKZN Год назад +1

    The way i figured out the ram vdd was pressent . I usesd a themal camer and found 1 memory chip was not getting warm other chips we're gets warm. I removed the module and reballed and solder back.. problem was solved like this for me

  • @MrRvdbeek
    @MrRvdbeek Год назад

    So easy to reflow if you have the skills for many years. ❤thank you for the update

  • @rkirilkin
    @rkirilkin Год назад

    Thanks Sorin, excellent lession! But in my opinion in real life it is not reliable. I would remove the soldered memory chips (install the memory module in the slot) and it might be necessary to configure the straps there or flash another BIOS.

  • @minaedward3441
    @minaedward3441 3 месяца назад

    Genuine idea ❤

  • @weerobot
    @weerobot Год назад

    Cool..That's New..if you remove all On Board Ram and just use The Slot Would That Work??

  • @MrDeadrage
    @MrDeadrage Год назад +1

    i am very learning alot from you . thx you sorin

    • @masterliu1892
      @masterliu1892 Год назад

      Friends, if you do it, practice is meaningful, and theory is only the foundation. To become a master, you have accumulated experience from the maintenance of countless laptops.

  • @GregM
    @GregM Год назад +1

    The problem will probably reoccurr and this was a temporary fix due to the flexibility of the motherboard and the quality of the solder used on the ram chips.

  • @AngelaAnderson-t8k
    @AngelaAnderson-t8k Год назад

    please is there any place i could get the exact tool you use for repair ... somethingthe power-supply and multimeter and manymore

  • @wadib3eed7
    @wadib3eed7 Год назад

    Hello
    I have a question i need a help from you
    my question is
    how to test logic gates on board like OR gates , and so on ?

  • @olawaleolusegun
    @olawaleolusegun 9 месяцев назад

    i have always been a big fan of yours
    but the main power rail
    is what i don’t know
    i really can’t see that capacitors
    and i wish to know it
    i really want to sire

  • @farmanfarman209
    @farmanfarman209 Год назад

    hello sir its good
    how can disable the onboard RAM and use usual ram for this laptop?

  • @Matthew_T24
    @Matthew_T24 Год назад +1

    Nice VIdeo as always🔥🔥

  • @EricMbatchou-v7k
    @EricMbatchou-v7k 7 месяцев назад

    Good job

  • @iuliandumitrescu9441
    @iuliandumitrescu9441 Год назад +1

    Se pare ,experienta cu Cobra,HC85,HC90 au fost de folos .🙃(doar ai parul alb)

  • @danandrei96
    @danandrei96 Год назад

    Sorin the madlad as always, removed the fan but will happily reflow the ram with battery still in the computer. Definitely braver than I am

  • @petermaller4207
    @petermaller4207 Год назад

    What's the temperature of the hotair you used to reflow the RAM?

  • @udi112
    @udi112 Год назад

    Amazing repair

  • @warunakumara7671
    @warunakumara7671 Год назад

    sir please guide us if caps lock button work what does it mean internally , hw to identify which ram chip has been failed ,

  • @mustaphahammad1196
    @mustaphahammad1196 Год назад

    Wow that was a nice one

  • @rfr653
    @rfr653 Год назад

    Good job mate 👍

  • @barcaking17
    @barcaking17 Год назад

    u should reball the ram chip by the way good job

  • @Mr.Nabil.Belhaj
    @Mr.Nabil.Belhaj Год назад

    what are the odds 😮, I'm working on a lenovo ideapad 3 and it's seems to be working fine however it's secretly suffering from on board ram issues, this led to it's hhd to die, replaced it with nvme ssd and still the ram corrupts the files when trying to install windows, but it works when the drive is installed on another laptop then plugged into the lenovo

  • @jovenlorilla8533
    @jovenlorilla8533 10 месяцев назад

    What if just remove the faulty chip, it is possible that the remaining chip will work?

  • @KeithChildress
    @KeithChildress 5 месяцев назад

    I have a strange situation. My Dell Latitude 7390 2-in-1 will boot to Windows 11 on external SSD, but I get BSOD when trying to boot to Windows 11 on internal SSD. I ran MemTest86 and the test aborted almost immediately due to too many errors. Why would it boot and run just fine using external SSD with so many RAM issues?

  • @UniqueComputer-tx3du
    @UniqueComputer-tx3du Год назад

    Master Sorin💪

  • @Soloptech
    @Soloptech Год назад

    How about removing the inbuilt ram and insert a removable Ram ? will not still work

  • @CukiErti
    @CukiErti Год назад

    Proper nice 4k!

  • @anonymous_t223
    @anonymous_t223 Год назад

    That flex is crazy

  • @Pravin-wt4zn
    @Pravin-wt4zn 6 месяцев назад

    Will it work with 1 ram put in to slot without reparing soldered ram

  • @uio86a
    @uio86a Год назад

    I ripped off three capacitors on top of my memory while inserting my laptop memory as a flat-blade driver...Can't I use it? Does it break down while using it?

  • @تعلمالكمبيوترمحمدالعطار

    If you'll excuse me, I've got the shape of a hp 650 g2 with a rehearsal that could be opened up to a copy, and it's possible that before I do, the Rustart, knowing that I'm shipping Beus, and the same problem is that your presence is able to save me.

  • @rscelectrical7091
    @rscelectrical7091 Год назад +1

    Great video, it's Murphy's law at play: No matter what chip you reflowed first it will always be the last one you try 🙂.

  • @barttechcomputers1819
    @barttechcomputers1819 Год назад

    which overhead camera is this :)

  • @behzadsaboonchi
    @behzadsaboonchi Год назад

    WoOoOoW amazing repair

  • @kevton_computers_Nairobi
    @kevton_computers_Nairobi Год назад

    I have an ideapad tht i cant find the resistor to disconnect ram voltage so tht i can use dimm

  • @dhankthapamagar3389
    @dhankthapamagar3389 Год назад

    Sir, How can we check a faulty Ram Slot and Faulty Ram with Multimeter? I mean by checking Voltage drops and so on,

  • @maz.reparateur
    @maz.reparateur Год назад +2

    Hi Sorin, thanks for the video.
    At 9:04 you're saying, it is going to work if you take out the RAM chips, but I believe it will not work, I already tested. You have to disable the onboard RAM memory hardwarely or softwarely by editing the BIOS. Here is video of testing and how to disable it by editing the BIOS on a Lenovo laptop: ruclips.net/video/WQfseAf-a1I/видео.html
    And, I think, we will need this more often in future because, as you say, all new laptops have onboard RAM integrated and it can fail.
    Cheers

  • @TheEli1963
    @TheEli1963 Год назад +1

    It's a miracle that the chip doesn't have a underneath glue..

  • @yassinekadri609
    @yassinekadri609 Год назад

    Have the same issue but in ram slot
    It was working fine for a year
    Then sometimes it works and sometimes not
    Then it starts showing same screen (when u pushed the 1st chip) when im working on it
    And now it doesn't even work
    Any solution!?
    I have one ram slot just like the pc in video

  • @davidhwang8407
    @davidhwang8407 Год назад

    it's great job !!!!