Hi Richard, When I saw the first few seconds, I was pretty sure that you were going to announce that you had found a short on the motherboard with the back of your right index finger. I enjoy your videos, thanks.
I really learned a lot about Chips and enable signals in this video, even if it had nothing to do with the actual magic like fix. Really enjoyed those 2 parts thank you very much!
I think what happened here was the SIO chip was kinda 'frozen'. I have seen this mentioned elsewhere - and with me removing the CMOS battery for some time it was similar to resetting the BIOS and it started to work. All the EN signals that I was tracing do originate at the SIO and I was expecting to prove it was faulty, or at least suspect, when the laptop started to work. The SIO is responsible for powering up all the voltage rails before handing control over to the PCH which starts the clocks (oscillators) and then the CPU. The laptop is still functioning since the 'repair'
Heya, I learned a lot I understand that the differant cpu's (ic's) have there own psu. maybe you are write with the super I/O IC I wouldn't trust it do.maybe do a 12 hour time run to see if it stayes good
Just my opinion but at 38:07 there is a good view of the chip and in the bottom right corner something looks different. There's a connection that's shiny compared to the others. I wonder was there a bad connection that you cleared while probing or possibly a bridge that you cleared. Not sure, just a observation. Thanks for the videos they are great help. Hello from Ireland
When you took out the cmos battery, the pin looked slightly discolored. I wonder when taking it out you scratched the rust off of it enough for the connection to work again. Could be wrong but that to me seems like the only connection (pardon the pun).
I would just like to add - this laptop is still working, weeks after I 'repaired' it :D
Hi Richard,
When I saw the first few seconds, I was pretty sure that you were going to announce that you had found a short on the motherboard with the back of your right index finger.
I enjoy your videos, thanks.
I really learned a lot about Chips and enable signals in this video, even if it had nothing to do with the actual magic like fix. Really enjoyed those 2 parts thank you very much!
I think what happened here was the SIO chip was kinda 'frozen'. I have seen this mentioned elsewhere - and with me removing the CMOS battery for some time it was similar to resetting the BIOS and it started to work. All the EN signals that I was tracing do originate at the SIO and I was expecting to prove it was faulty, or at least suspect, when the laptop started to work. The SIO is responsible for powering up all the voltage rails before handing control over to the PCH which starts the clocks (oscillators) and then the CPU. The laptop is still functioning since the 'repair'
The Voodoo element was with you in this one!
I just had the same Laptop with same issue and it was the cmos battery too. liked and subscribed
Welcome to the channel. Good to hear the video helped someone :-)
Heya, I learned a lot I understand that the differant cpu's (ic's) have there own psu. maybe you are write with the super I/O IC I wouldn't trust it do.maybe do a 12 hour time run to see if it stayes good
more motherboard repair video... god bless your channel, thank u
Great to see you enjoyed it - yes I will definitely be making more component level motherboard repairs - desktop and laptop :-)
@@LearnElectronicsRepair nice one.. i really enjoy your contents... keep it up
Thanks a lot.
You Just saved my laptop.
Glad to hear that
Just my opinion but at 38:07 there is a good view of the chip and in the bottom right corner something looks different. There's a connection that's shiny compared to the others. I wonder was there a bad connection that you cleared while probing or possibly a bridge that you cleared. Not sure, just a observation. Thanks for the videos they are great help. Hello from Ireland
When you took out the cmos battery, the pin looked slightly discolored. I wonder when taking it out you scratched the rust off of it enough for the connection to work again. Could be wrong but that to me seems like the only connection (pardon the pun).
thank you!!
Did this ever come back in for repair?
No mate as far as I know it is still working
Bad solder joint?
I would rework the APR 8804 chip, that's where you were probing the enable pin when it started working.