...some new findings: when PU8510&11 are removed and the board is turned on, the 1V_VGACORE_S0 is 0.8V (measured on the PL8501-3 coils) - so this rail seems to be not shorted, and PWR_VGA_GDDR is 1.35V measured on PL8604, but this coil becomes very hot eventually (dGpu remains coldish)..
What is strange, that the resistance to GND at PL8501-3 is about 1.8 Ohms, and at the NVVDDS (PL8508&9) it is ca. 50 Ohms (without PU8510&11). Aren't these outputs the same 1V_VGACORE_S0 ? There shouldn't be this big difference in resistance to ground --> would this indicate a faulty PU8609...
mrsz1
New Member
Last Activity: 12-05-2024, 07:26 AM
Joined: 09-29-2020
Location: Budapest
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Acer Nitro VN7-593G dead? dGPU
Greetings,
I have an Acer Nitro that suddenly turned off while I was using it. No lights, no power, stock DC power supply goes into safe mode when plugged, battery connector is also seem to be shorted while the battery is connected. No visible faulty components are on the board.
Narrowing down the issue I found shorted dGPU 1V_VGACORE rail to be a suspect.
Removing PU8510 (and PU8511) seems to eliminate the issue, the laptop is working on iGPU, charging (new battery) is also fine.
Replacing PU8510 or PU8511 did not seem to solve the issue, the same symptoms come... -
Acer Nitro 15 VN7-593G schematics & Boradview
Acer Nitro 15 VN7-593G Schematics & Boradview... -
Greetings from Hungary, Mrsz1 was here!Leave a comment:
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