I might have come to a conclusion a little too fast.
I didn´t see, that the buck converter is fed by +V5A and +V_DC.
I measured these and I get everything. So +V5A, +V_DC and also +V3P3A is there:
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So it´s possible, that only the buck converter is busted.
What do you think?I might have come to a conclusion a little too fast.
I didn´t see, that the buck converter is fed by +V5A and +V_DC.
I measured these...

Here is the schematic of the board:...

Here is the schematic of the board: [COLOR=#c0392b][B]Schematic moved to new thread[/B][/COLOR] - [url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-desktop-motherboards-graphics-cards-and-pc-peripherals/bios-schematic-requests/3511155-acer-c27-1655-schematic[/url]Here is the schematic of the board: [COLOR=#c0392b][B]Schematic moved to new thread[/B][/COLOR] - [url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-desktop-motherboards-graphics-cards-and-pc-peripherals/bios-schematic-req

Hi!

I´ve got an Acer C27-1655 AiO computer for repair on my bench.
Mainboard: AX1T_MAIN_PCB

The liquid was mainly in the area of MQ1, the voltage regulator for +VDDQ_MEM (pictures attached).

Symptoms:
When power is connected and power switch is pressed, I get 5V at L1, 3.3V at L2 and 1.8V at LPM5. I also get V1.05A_BYPASS at R442 for PCH.
I also measure 2V on +V1.8U_2.5U_MEM but +VDDQ_VTT and +VDDQ_MEM stay at 0V. +V1.8U_2.5U_MEM is also drawn to 0V if RAM memory is installed.
LPM1, LPM2 and LPM3 stay at 0V.

+VDDQ_MEM...