Goodmorning friends of the forum. This laptop has isegent defects:
When I give power on it does not react,
I have to make several attempts until that main power up.
I have no image on both lcd and vga screens.
I noticed that it warms up the pch.
The tensions seem to be there in the coils except that of the cpu (cpu_core) that are missing.
I tried to exchange the cpu but nothing.
I tried to reprogram the bios with dumps found on the net but nothing to do.
I did a reflow on the NVIDIA bga but nothing.
Also changed the ram but nothing
The resistance on coils with inserted cpu and 12 Ohm, I think it is correct.
The thing that leaves me perpplesso and that pch warms up a lot and does not seem normal.
Since I do not have printing on the board it is difficult to follow the diagram but I have measured near the pch of the capacitors and I find a resistance of 3ohm which seems to me low.
I checked on U511 at pin 7 and I find 3V.
Thank you
When I give power on it does not react,
I have to make several attempts until that main power up.
I have no image on both lcd and vga screens.
I noticed that it warms up the pch.
The tensions seem to be there in the coils except that of the cpu (cpu_core) that are missing.
I tried to exchange the cpu but nothing.
I tried to reprogram the bios with dumps found on the net but nothing to do.
I did a reflow on the NVIDIA bga but nothing.
Also changed the ram but nothing
The resistance on coils with inserted cpu and 12 Ohm, I think it is correct.
The thing that leaves me perpplesso and that pch warms up a lot and does not seem normal.
Since I do not have printing on the board it is difficult to follow the diagram but I have measured near the pch of the capacitors and I find a resistance of 3ohm which seems to me low.
I checked on U511 at pin 7 and I find 3V.
Thank you
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