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From the description you have provided, the audio output ic is loading the system down causing it to shutdown, the remedy! replace the audio output ic. But to check! power off, remove speaker wires from back and power on, if standy stays on, the above part must be replaced, but if standby stays off there is short in one of the wires and speaker.
There were 2 Switching power supply circuit inside the ATX PSU. There's a Standy PWM circuit whichSupply +5V to the PWM IC of the Main PWM. Stand by pwm still working or insufficient voltage, lower than +5V. This is the reason you still have Green light. Check or replaced small filter capacitor around 100 MFD 16V, open resistor or shorted diode that was nearest of the PWM IC.. Watch out for charge voltage on big capacitors.
The
DC jack, where you plug the power adapter cable, might be loose or
defective, & needs to be either re-soldered or replaced. In order to do this, the laptop needs to be disassembled
& the motherboard taken out. Also, the motherboard needs to be checked for defective/burned out components in the
area near the DC jack. Any defective/burned out components found should
be replaced, or you might need to replace the laptop's motherboard
altogether.
Power drain would be a better solution in this case. 1.first shut down the comp 2.unplug the charger 3. remove the battery and after press and hold the power button for 60 seconds without any charger and the battery.After the 60 seconds replug the battery and the charger and turn the computer
I don't think it's possible for a virus to effect the Bios page. If it's slow in the bios page then there is probably a problem with the video card or the monitor.
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