hello every one need help with acer 5741 la-5892

[amr soliman]

i have acer 5741 main la-5892 it shutdowon in about 5 min
i tried several bios but same problem or some files shutdown faster than 5min
i dont have the original bios and laptop show me region on startup
any help

[amr soliman]

Re: hello every one need help with acer 5741 la-5892

any help here

[Sephir0th]

Re: hello every one need help with acer 5741 la-5892

Internal shorted DC-IN mosfets can cause this behaviour too. However, I don't understand fully what you shared about "Laptop show me region". Pls clarify

[amr soliman]

Re: hello every one need help with acer 5741 la-5892

it start up but after logoit show balck screen with white dash in left corner for about 45 second the amessag says erorr sending end of post message to me
and shutdown in about 5min

[dellxps15]

Re: hello every one need help with acer 5741 la-5892

check thermal pad under pch..... most of the time it's just too thin pad that doesnt dissipate or make contact.

[mcplslg123]

Re: hello every one need help with acer 5741 la-5892

Make sure the new bios is me cleaned. Why not doenload the update file from acer and cut it to size and flash to rule out bios issue?

[amr soliman]

Re: hello every one need help with acer 5741 la-5892

It's little bit hot un pch

[dellxps15]

Re: hello every one need help with acer 5741 la-5892

doesnt it has heatsink on pch like this ?

[amr soliman]

Re: hello every one need help with acer 5741 la-5892

yes its the same

[Sephir0th]

Re: hello every one need help with acer 5741 la-5892

it start up but after logoit show balck screen with white dash in left corner for about 45 second the amessag says erorr sending end of post message to me
and shutdown in about 5min

Is it so hard to share a picture to clarify the issue?

[amr soliman]

Re: hello every one need help with acer 5741 la-5892

CN you at least explain

[dellxps15]

Re: hello every one need help with acer 5741 la-5892

in the year this notebook have maybe at one time they repasted cpu and didnt put pch pad back, or they changed thikness with a wrong one and many of this model have now pch problem.
another common problem is related to the first 2 mosfet gate that dont open correctly, get hot and make notebook poweroff after a while.
check schematic for first 2 mosfet in dc-in section and check voltage at drain source gate to see if there is no problem here.
if notebook turn off after 54 minutes then must be some thermal - powerdrain issue.
if u run a memtestx86 from usb , does it stay on ?

[amr soliman]

Re: hello every one need help with acer 5741 la-5892

ididnt use memtest86-usb but tried with winpe still the same
it sutdown after 5min but with some bios version it shutdow when windows logo start