Hello - this laptop originally as it had no power at all, battery was flat and wouldn't charge.
I traced the problem back to the connection to the screen, the positive supply for the LED backlight was shorted (not a direct but low resistance) to ground and was stopping the backlight from working and draining the battery quickly.
After taking these wires out of the connector, I connected them directly to a point on the PCB and then the backlight worked and the laptop booted up.
However an hour or so later something has happened to the laptop and now it won't boot up, I've checked my connections and nothing is shorted to anything, unsure if it is anything I have done or possibly a legacy fault caused by the original problem which has now surfaced.
What is happening is when the AC adapter is connected or the battery reconnected the laptop turns itself on automatically and the fan runs at full speed, the charge light then flashes orange 8 times, then lights up white and the orange LED flashes again 8 times. All LEDs light up on the keyboard solid without any flashing and then the laptop turns off. Several seconds later it turn back on again with the fan on full, keyboard LEDs on and then the charge light starts flashing orange and it tuns itself off again. The cycle continues to repeat.
I have measured the AC supply and it draws no more than 10 watts, so the battery is not charging and the processor is stone cold. There is no flicker or anything from the screen either.
Any advice would be greatly appreciated, and I don't have a schematic.
I traced the problem back to the connection to the screen, the positive supply for the LED backlight was shorted (not a direct but low resistance) to ground and was stopping the backlight from working and draining the battery quickly.
After taking these wires out of the connector, I connected them directly to a point on the PCB and then the backlight worked and the laptop booted up.
However an hour or so later something has happened to the laptop and now it won't boot up, I've checked my connections and nothing is shorted to anything, unsure if it is anything I have done or possibly a legacy fault caused by the original problem which has now surfaced.
What is happening is when the AC adapter is connected or the battery reconnected the laptop turns itself on automatically and the fan runs at full speed, the charge light then flashes orange 8 times, then lights up white and the orange LED flashes again 8 times. All LEDs light up on the keyboard solid without any flashing and then the laptop turns off. Several seconds later it turn back on again with the fan on full, keyboard LEDs on and then the charge light starts flashing orange and it tuns itself off again. The cycle continues to repeat.
I have measured the AC supply and it draws no more than 10 watts, so the battery is not charging and the processor is stone cold. There is no flicker or anything from the screen either.
Any advice would be greatly appreciated, and I don't have a schematic.
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