After doing everything, i found my solution. The cmos battery wire is the problem. Glad i tried changing the wire. I was about to solder new bios chip!
@@SirYus99thanks bro u helping us, i need your help i changed my battery and after that it showing this cmos error, i am using OMEN 15dc Laptop i think my laptop doesn't have this cmos battery cell then how do i fix this issue , plz help if you know
I just bought hp pavilion 15 yesterday and the screen went black after showing cmos bios 502 error then i hold the power button for 15 sec and it started working normally. Should i replace it or contact hp centre or keep this laptop please suggest i only have 6days to take any action
Sorry for late reply, I just see your comment. Definitely you need to change the laptop. Actually inside the small CMOS battery is dead. That's why you get this error.
New HP notebook I received the message hp cmos checksum error 502. I know that when it was bought they entered the Bios. After the message appeared, it took me to the installation of win10. What I do? Continuous installation windows10? I forcibly turn off and enter Bios? Do I return the Notebook to the store?
Question: I cannot turn on my laptop just by pressing the power button, even when the laptop battery has charge. Always have to plug in the external power then turn on. After that i can remove the plug in and it works fine. I have already updated the BIOS. Also my laptop battery is new. But everytime i try to switch on this happens and shows me CMOS Checksum invalid. What do i do?
then maybe your battery have some defect or it has to do something with the point where your laptop connect with battery and those are called "terminals"
This error has made my HP laptop display not work anymore what exactly should I do nobody knows how to fix it even service repair said it’s unrepairable despite no physical damages to the screen motherboard , Ram , cmos battery all that it’s very puzzling as to why the HP logo refuses to display a picture if you have any ideas let me know
If the CMOS battery is fine then maybe It comes from a BIOS error. Please install the HP support assistant and update BIOS according to your model. or write your problem to this app help center, definitely they help you. Thank you.
@@SumansWorld I should also note there was 3 long beeps and 2 short caps lock beeps on my keyboard but it is inconsistent it did it Saturday (3/4/23) when it initially statures and it started not too long ago 3/9/23 when it was charging maybe it blinks on my keyboard when it is charging and not when the battery is full? Not entirely sure but I wanted to point out how inconsistent that the caps lock blinking is
It is the bios that is the issue, search online how to update or fix ur BIOS and it will work. Lol i hope after a year you have gotten it fixed tho@@thenamelessdemigod
actually i bought new hp pavilion ec0035 au model with ryzen processor on 13th Nov, I used it for one hour, charged the battery. And due to some reason I had to leave the city and left system at home, Didn't use it for 2 months. When i started the system after 2 months it was not having any charge, so i charged it for an hour and press power button and i received this error. It restarted after few seconds and window started and i realized that time is showing same, 13th Nov and it took a lot of time to update the correct time. Do u also need to change this battery. Mine is unused laptop, what to do?
I already tried doing this because my PC recently stopped booing on, and I somehow figured out to boot it on and it was giving me that same cmos checksum was invalid but the next day after I shut it down, it wouldn’t start and I even though I already had some batteries that was also three voltage still my computer wouldn’t boot up
Actually this not a big problem. every insight the laptop has a BIOS CMOS battery for save time,date, and some bios information. When the small CMOS battery is very low then this warning are shows. You can continue with this problem. but it's better to change the CMOS battery. Thank you.
Hii iam also facing same issue but my laptop works fine ,but sometimes when i am charging it stops the charging suppose at 40% and the white light appears and starts charging again. is it because of that CMOS issue ? please help
I was working on my laptop and it suddenly turned off and wasn't starting again, i didn't knew what gone wrong so i tried searching for options to fix it. I found some tricks to restart it like 30 second hold power button but none was helpful. Next day it was working after couple of tries and showed me this " cmos 502" so i updated bios and everything from the official hp website then after 15 minutes or so it turned off again and after few more tries i found this error again. Can you please tell me what is exactly wrong in my laptop is it motherboard or cmos battery????
Whenever i click on power button one of the two white light present on the right side turns on for like 3 seconds. And my laptop battery is already dead from a month now i am using it as it is cuz of pandemic and its really hard to find a replacement in my location.
Okay,,,,i read your all massage. and understand your problem bro. actually, your laptop battery is in good condition really. and after a few months later your CMOS battery is dead it is normal broo. the actual problem is the motherboard battery ic which is present in the laptop motherboard. You need to find a good repair shop and repair it ,,,it need 1500-2000 rupees and then you can solve your all problem. after that your battery work properly. really. Thank you. and I'm sorry for the late reply. I understand your feeling because I'm a computer loving guy.😕
Yes. it's resolved the problem. But you need to shutdown properly. If suddenly electric gone then again when you turn on the laptop same text error massage showing you. Thanks Afnan for query.
soo um what about omen laptops???they dont have that 3v battery at all and error appears and begun when battery inflated changed to new one and still error appears??????????
@@Adhoper they said the main battery is the cmos battery, sad 😭😭 so we need to replace it and i cant find it here it cost 1/4 the pc price if i bring it from abroad
Bro my laptop goes off automatically during sleep mode and not turning until i kept it in refrigerator for 30mint .Then turn on and shows 502 error when i press enter key it get started.
That means your laptop CMOS battery or mini battery is out of charge. You need to change it. One thing you notice is that your computer's real-time is changed every time. That's the main problem. Just replace it by yourself. Thank you.
@@Fearless-ku2vs I actually bought hp pavilion 15 yesterday and the screen went black then I pressed the power button for 15 sec and CMOS bios 502 error showed up then it started working properly after restart. Should I replace it or contact hp centre or go with this laptop only ?
If your laptop doesn't have separate CMOS battery like mine and your computer doesn't even turning on. 1. Hold Win key + V an press power Button 2. On Error screen press ENTER to rebot the system. 3. Go to Bios for me is F10 or ESC. 4. Navigate to Boot Options Disable Secure Boot, Clear All Secure Boot Keys, Endable Legacy Support. 5. Save and Exit for me 100% fix after all day fighting.
I want to corrupt the checksum. Are the following command correct? debug o 72 2E O 71 FF Exit If I corrupt the checksum I can reset the bios password. Before running previous command, I have I want to be sure if they are not dangerous for my computer. Eg : impossible to boot Thanks for the 💡
Hey what you did then please tell I'm facing the same problem just bough it yesterday. Should I replace it or it will be okay? As my laptop restarted after pressing power button for long
After doing everything, i found my solution. The cmos battery wire is the problem. Glad i tried changing the wire. I was about to solder new bios chip!
Kitna paisa lagaa
Dude, I just found your comment on another video
@@yeetgaming6720 haha yes. I try to let other people know so it can help them
@@SirYus99thanks bro u helping us, i need your help i changed my battery and after that it showing this cmos error, i am using OMEN 15dc Laptop i think my laptop doesn't have this cmos battery cell then how do i fix this issue , plz help if you know
How did you solve the wore problem? Did you replace it?@@SirYus99
I just bought hp pavilion 15 yesterday and the screen went black after showing cmos bios 502 error then i hold the power button for 15 sec and it started working normally. Should i replace it or contact hp centre or keep this laptop please suggest i only have 6days to take any action
Sorry for late reply, I just see your comment. Definitely you need to change the laptop. Actually inside the small CMOS battery is dead. That's why you get this error.
I have a 15-da HP and when I open it I can't find the compartment where the cmos battery is put, please help
Same here bro
Hello.
Please I have the same problem with HP envy X360 15.6" convertible laptop core i7 11th
Bro this is the issue right laptop is turning off in not time
New HP notebook I received the message hp cmos checksum error 502. I know that when it was bought they entered the Bios. After the message appeared, it took me to the installation of win10. What I do?
Continuous installation windows10? I forcibly turn off and enter Bios? Do I return the Notebook to the store?
@SUMAN'S WORLD
maybe any internal issue that's why OS software is corrupted.
@@tigreonice2339 yes return to the store.
@@SumansWorld what should I do?
@@SumansWorld :( ok thanks
So my laptop battery doesn't charge it only works with power cable on is this due to CMOS battery aswell? Or battery is faulty?
You need to change CMOS battery. it's can give 2years backup. and yeah you can run your laptop without battery. no issue. Thank you.
I am facing the same issue...how did you solve it
Question: I cannot turn on my laptop just by pressing the
power button, even when the laptop battery has charge.
Always have to plug in the external power then turn on.
After that i can remove the plug in and it works fine.
I have already updated the BIOS. Also my laptop battery is
new.
But everytime i try to switch on this happens and shows me
CMOS Checksum invalid.
What do i do?
Tell me your laptop model number please.
It happens the same to me too, HP Laptop 14-ck0xxx
Have you found a way to fix it sir?
Any solution to this yet?
Having the same issue as well, happened after I got a new battery
Laptop model is HP 14CF0013DX
then maybe your battery have some defect or it has to do something with the point where your laptop connect with battery and those are called "terminals"
This error has made my HP laptop display not work anymore what exactly should I do nobody knows how to fix it even service repair said it’s unrepairable despite no physical damages to the screen motherboard , Ram , cmos battery all that it’s very puzzling as to why the HP logo refuses to display a picture if you have any ideas let me know
If the CMOS battery is fine then maybe It comes from a BIOS error. Please install the HP support assistant and update BIOS according to your model. or write your problem to this app help center, definitely they help you. Thank you.
@@SumansWorld I should also note there was 3 long beeps and 2 short caps lock beeps on my keyboard but it is inconsistent it did it Saturday (3/4/23) when it initially statures and it started not too long ago 3/9/23 when it was charging maybe it blinks on my keyboard when it is charging and not when the battery is full? Not entirely sure but I wanted to point out how inconsistent that the caps lock blinking is
It is the bios that is the issue, search online how to update or fix ur BIOS and it will work. Lol i hope after a year you have gotten it fixed tho@@thenamelessdemigod
actually i bought new hp pavilion ec0035 au model with ryzen processor on 13th Nov, I used it for one hour, charged the battery. And due to some reason I had to leave the city and left system at home, Didn't use it for 2 months. When i started the system after 2 months it was not having any charge, so i charged it for an hour and press power button and i received this error. It restarted after few seconds and window started and i realized that time is showing same, 13th Nov and it took a lot of time to update the correct time. Do u also need to change this battery. Mine is unused laptop, what to do?
@SUMANS WORLD
Any solution? 🤧
yes you have to change cell because after 2 months this cell has completely lost its charge
I already tried doing this because my PC recently stopped booing on, and I somehow figured out to boot it on and it was giving me that same cmos checksum was invalid but the next day after I shut it down, it wouldn’t start and I even though I already had some batteries that was also three voltage still my computer wouldn’t boot up
I opened up my hp pavilion x360 14-ba series. Doesn't have a button cell button inside. So then how?
how u fixed i also dont have this battery cell inside
my pc are very slow performance, is this the cause? sorry bad english
No, you need to upgrade your HDD to SSD and you can extend your PC RAM for better performence. Thanks GERSON.
My PC was showing this too but when I restarted it, it started normal. Will there be a problem?
Actually this not a big problem. every insight the laptop has a BIOS CMOS battery for save time,date, and some bios information. When the small CMOS battery is very low then this warning are shows. You can continue with this problem. but it's better to change the CMOS battery. Thank you.
@@SumansWorld how much it cost?
Hii iam also facing same issue but my laptop works fine ,but sometimes when i am charging it stops the charging suppose at 40% and the white light appears and starts charging again. is it because of that CMOS issue ? please help
Bro.. Even my laptop had the same issue last year, I replaced the main laptop battery and the issue is gone.
@@george_jc11same thing with me i replaced my laptop battery and it's happening after that, what can be the issue ? new battery is faulty?
I was working on my laptop and it suddenly turned off and wasn't starting again, i didn't knew what gone wrong so i tried searching for options to fix it. I found some tricks to restart it like 30 second hold power button but none was helpful. Next day it was working after couple of tries and showed me this " cmos 502" so i updated bios and everything from the official hp website then after 15 minutes or so it turned off again and after few more tries i found this error again. Can you please tell me what is exactly wrong in my laptop is it motherboard or cmos battery????
Please help!!
Whenever i click on power button one of the two white light present on the right side turns on for like 3 seconds.
And my laptop battery is already dead from a month now i am using it as it is cuz of pandemic and its really hard to find a replacement in my location.
Okay,,,,i read your all massage. and understand your problem bro. actually, your laptop battery is in good condition really. and after a few months later your CMOS battery is dead it is normal broo. the actual problem is the motherboard battery ic which is present in the laptop motherboard. You need to find a good repair shop and repair it ,,,it need 1500-2000 rupees and then you can solve your all problem. after that your battery work properly. really. Thank you. and I'm sorry for the late reply. I understand your feeling because I'm a computer loving guy.😕
@@SumansWorld thank you for replying 🥺, i will get it fixed this Saturday.
@@SumansWorld its is the same problem as me, I opened my laptop hp but I can't see mother. battery I can replace it by myself but I cant find it
My laptop don't have the battery. If I change the bios battery will it work? That means will the cmos error resolved?
Yes. it's resolved the problem. But you need to shutdown properly. If suddenly electric gone then again when you turn on the laptop same text error massage showing you. Thanks Afnan for query.
@@SumansWorld thank you for your answer
soo um what about omen laptops???they dont have that 3v battery at all and error appears and begun when battery inflated changed to new one and still error appears??????????
did you find a solution??? i have a HP Omen 15-dh1000ne with a cmos error aswell, it just suddenly turns off ONLY when im playing games
Hi. Is it diffrent battery? It originally says CR2032 but new one says CR2025.
no ,,,You can put any 3.5v battery and must be battery size will be same. Thank you mam.
i cant find this battery bro i saw so many videos of opening my laptop and no one mentioned it its hp 15-da0009la
I have the same problem, could you solve it?
@@Adhoper they said the main battery is the cmos battery, sad 😭😭 so we need to replace it and i cant find it here it cost 1/4 the pc price if i bring it from abroad
my laptop dont have a battery CMOS bios :(
Dear hamre yahan. HP dekstop hai us mein bhi yeh error ke sath woh apne on ho ja Raha bole to ups on karte hi direct on ho raha hai
Thanks. I am having this problem and was looking for a solution. Got this video.
Glad it helped
Bro my laptop goes off automatically during sleep mode and not turning until i kept it in refrigerator for 30mint .Then turn on and shows 502 error when i press enter key it get started.
Thank you so much. I managed to fix my problem following this video! 😊
what is th typ of your lap ?
hp-Ay 503tx notebook.
for me this message appeared and then 10 seconds later the laptop started , what does that mean ?
That means your laptop CMOS battery or mini battery is out of charge. You need to change it. One thing you notice is that your computer's real-time is changed every time. That's the main problem. Just replace it by yourself. Thank you.
For me its just got resolved after like a min 😂
How
@@Rudro144 I just wait and my PC restarted
@@Fearless-ku2vs still working good or u faced any further problems?
@@mithudas8440 nope honestly I just forgot it even existed
@@Fearless-ku2vs I actually bought hp pavilion 15 yesterday and the screen went black then I pressed the power button for 15 sec and CMOS bios 502 error showed up then it started working properly after restart. Should I replace it or contact hp centre or go with this laptop only ?
Thanks lot,,, it's work for me,,,cmos failure gone
It didn't work
can make a tutorial of 14s change cmos
Thanks bro I love u🥰
Love you too bro🙏
Darun laglo.....👍👍👍👍👍👍
If your laptop doesn't have separate CMOS battery like mine and your computer doesn't even turning on.
1. Hold Win key + V an press power Button
2. On Error screen press ENTER to rebot the system.
3. Go to Bios for me is F10 or ESC.
4. Navigate to Boot Options Disable Secure Boot, Clear All Secure Boot Keys, Endable Legacy Support.
5. Save and Exit for me 100% fix after all day fighting.
Gg man❤️
Man and... ¿if after all doesn't work?
Thanks man
Bro you'rere fxxxxxx my hero!
my laptop is missing the legacy support in the bios menu but i have disabled the secure boot, will that be enough to resolve the problem?
Great video
Glad you enjoyed it
guess im effed.
I want to corrupt the checksum. Are the following command correct?
debug
o 72 2E
O 71 FF
Exit
If I corrupt the checksum I can reset the bios password. Before running previous command, I have I want to be sure if they are not dangerous for my computer. Eg : impossible to boot
Thanks for the 💡
Ps my laptop manufacturer is Asus. Is the method will work?
yes. it's work
Beautiful.....🥰🥰🥰
I have a 15-da HP and when I open it I can't find the compartment where the cmos battery is put, please help
then there is no cell in your laptop because it is new. now you have to change the main battery
Newer laptops don't have a CMOS battery. Is the main battery dead in your laptop .
@@iplayloud2 what to do in newer laptop?
I cant see the cmos on hp pavilion 15cs. Help!!
Hey what you did then please tell I'm facing the same problem just bough it yesterday. Should I replace it or it will be okay? As my laptop restarted after pressing power button for long