Fujitsu Lifebook AH53/X Need Schematics or boardview

[Duranitron]

Fujitsu Lifebook AH53/X FMVA53XBKS
Specs: Intel i7 processor, 8Gb ddr4 memory module, 250Gb SSD,
date stamp is 2016
Motherboard model: ADZAM-6050A2761701-MB-A01

Symptoms: Sometimes the unit will turn on made it to the windows login screen then turns off, most of the time the Unit can be turn on but only the power on is lit and will eventually turn of in less than 30 seconds, CPU fan spins, no beep code and no display.🤕🤕🤕

Basics: replaced known good 19v adapter, replaced known good ddr4 memory module, test the always on voltage 5v, 3.3v all voltage is present when you turn it on. try to flash the EEPROM with good bios dump, no avail

I notice that the voltage supplying the memory module is not stable, it turn on and off, maybe this is the culprit. My problem arises when I encounter this IC with part number S25M 5388 quad pack 36pins, its a step down converter 19v to 1.2v as DDR4 supply, I research that part number with no avail, even google bard think its an EEPROM IC 😀😀😀


Need a Schematics or board view of this unit to figure it out how can I replaced this IC with Generic parts.😀😀😀
any help is highly appreciated, thanks in advance

[Duranitron]

I'm sorry the IC S25m 5388 is only 32pins my bad

[Duranitron]

Found the ic its G5388K11U 32pins thanks to m1ch43lzm

[Duranitron]

there is no datasheet for G5388K11U but I found a direct replacement APW8861, APW8861QBI, APW8861QBI-TRG datasheet is available

[Duranitron]

follow up on my repair, the APW8861 in my opinion is not compatible with G5388K11U, bought 2 original APW8861 and place it in the board, no nothing no CPU fan spin, no output voltage, 19volts rail is present. I thought the IC is defective so I placed the other IC with same results, so I search the net, though its really difficult to find the IC, I was fortunate to locate an original IC G5388K11U from Indonesia., the moment I place it and turn on the laptop, CPU fan spins, all voltage are present including 1.2v output of this IC to power the DDR4 memory module, the laptop works fine. Hurray!!!😁😁😁 Laptop is fixed!!!