hi everyone
ive been working on a thinkpad p50 rev1.0.
i searched the site before hand and found a lot of information and schematics and bios files and got to work diagnosing what the issue was. i followed many threads here and confirmed all voltages were present and components were in good order.
the initial issue was the screen was replaced by someone else and then would not turn on again and it ended up with me. in my testing it would switch on for a second or 2 and switch off. i took the cmos battery out along with memory and ssd and i got 6 beeps when turned on and would immediately turn off. it did that only 2 times, and once with 4 beeps. after that it would only turn on for a second or 2 with fan spin and then begin to draw current to charge battery. thats its current state
from the beginning i suspected a BIOS issue, i checked everything i could before getting to chip-off. from what i could see the BIOS chip was U15, a winbond 25q80blnig.
i am running a CH431 based programmer called "nextprogrammer" ive tested it on a few random bios chips i found on donor boards laying around my lab and it all seems to work fine.
i soldered the BIOS onto the breakout board to plug into the reader. it detected it straight away and i backed it up twice and once more with the original black ch341a just to be extra safe.
i then downloaded the bios file (https://www.badcaps.net/forum/showpo...03&postcount=4)
while trying to write to it i get an error "the buffer size is larger than the ic size" is the chip damaged or did something go wrong or have i got the wrong ic or did i destroy it?
thanks
ive been working on a thinkpad p50 rev1.0.
i searched the site before hand and found a lot of information and schematics and bios files and got to work diagnosing what the issue was. i followed many threads here and confirmed all voltages were present and components were in good order.
the initial issue was the screen was replaced by someone else and then would not turn on again and it ended up with me. in my testing it would switch on for a second or 2 and switch off. i took the cmos battery out along with memory and ssd and i got 6 beeps when turned on and would immediately turn off. it did that only 2 times, and once with 4 beeps. after that it would only turn on for a second or 2 with fan spin and then begin to draw current to charge battery. thats its current state
from the beginning i suspected a BIOS issue, i checked everything i could before getting to chip-off. from what i could see the BIOS chip was U15, a winbond 25q80blnig.
i am running a CH431 based programmer called "nextprogrammer" ive tested it on a few random bios chips i found on donor boards laying around my lab and it all seems to work fine.
i soldered the BIOS onto the breakout board to plug into the reader. it detected it straight away and i backed it up twice and once more with the original black ch341a just to be extra safe.
i then downloaded the bios file (https://www.badcaps.net/forum/showpo...03&postcount=4)
while trying to write to it i get an error "the buffer size is larger than the ic size" is the chip damaged or did something go wrong or have i got the wrong ic or did i destroy it?
thanks
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