#1 Toshiba Satellite C55-A-1NR, MB: PT10SG DSC, Itself turns ON, dead power button
от matic • 6 Ноябрь 2017, 15:20
**************************************************************
Brand: Toshiba
Model: Satellite C55-A-1NR
Motherboard: Pegatron PT10SG DSC, Rev.: 2.1
**************************************************************
Hello!
I'm working on the mentioned laptop.
Symptoms:
-Immediately when connecting the charger, power LED turns ON, fan spins on max speed, no video.
-Power button doesn't react, also if it is pressed for multiple seconds, the laptop doesn't turns OFF.
-Battery isn't charging.
-If only the battery is connected the laptop is completely dead (I suspect that the battery is completely discharged).
3.3V and 5V power supplies are present. Other "RUN" voltages are also present on all other coils, except the one near GPU (no component designations on white "silkscreen").
RTC quartz (32.768kHz) near PCH oscillates. PCH gets pretty warm (about 70°C), CPU and GPU are only a little bit warm.
Issue is the same, regardless of whether the RAM memory is inserted or not.
What I have done up to now:
-On CMOS battery was only 2.8V, I replaced it with brand new one -> no changes.
-BIOS chips (MAIN+EC) reflashed with two dumps -> no changes.
-KBC chip (IT8528E) replaced with brand new one -> no changes.
Any ideas?
Brand: Toshiba
Model: Satellite C55-A-1NR
Motherboard: Pegatron PT10SG DSC, Rev.: 2.1
**************************************************************
Hello!
I'm working on the mentioned laptop.
Symptoms:
-Immediately when connecting the charger, power LED turns ON, fan spins on max speed, no video.
-Power button doesn't react, also if it is pressed for multiple seconds, the laptop doesn't turns OFF.
-Battery isn't charging.
-If only the battery is connected the laptop is completely dead (I suspect that the battery is completely discharged).
3.3V and 5V power supplies are present. Other "RUN" voltages are also present on all other coils, except the one near GPU (no component designations on white "silkscreen").
RTC quartz (32.768kHz) near PCH oscillates. PCH gets pretty warm (about 70°C), CPU and GPU are only a little bit warm.
Issue is the same, regardless of whether the RAM memory is inserted or not.
What I have done up to now:
-On CMOS battery was only 2.8V, I replaced it with brand new one -> no changes.
-BIOS chips (MAIN+EC) reflashed with two dumps -> no changes.
-KBC chip (IT8528E) replaced with brand new one -> no changes.
Any ideas?