Laptop Acer eMachines G640 won’t turn on, won’t power on, there is no display, just a black screen. This is a general diagnostic and repair steps to fix those problems.
Troubleshooting laptop Acer eMachines G640 won’t boot, won’t power on, no display just black screen
When you push on the Power Button the Power led lights ON or NOT, your Acer eMachines G640 won’t start up, and there is no display just a black screen. Possible problem and the fixes steps:
Battery has no charge left + AC adapter failed; you press the power button on laptop Acer eMachines G640 nothing happens, laptop won’t turns on and there is no display, the battery has no charge left, the motherboard doesn’t receive any power, laptop cannot turn on. You plug in the AC adapter but that doesn’t help, your laptop Acer eMachines G640 still won’t power on, there is a chance you have failed AC adapter. In this case try with another charger or check AC adapter with a Multimeter. If it’s dead, replaced with a new one.
Power circuit in wrong state or Over volt protection trips; you press the power button but nothing happens, laptop Acer eMachines G640 won’t turns on and there is no display just a black screen, your laptop has static electric charge made power circuit in wrong state. Unplug AC adapter, take out the battery and hold down power button for 30 seconds, the static charge will dissipate. Plug in the AC Adapter and turn on your laptop Acer eMachines G640. This should restore the system to normal operating mode.
Hardware failure; the laptop powers on, but there is no display just black screen with Power led lights ON or your laptop Acer eMachines G640 stock on logo or restart. In this case, it’s possible one of the Hardware failed. You can try to disassemble the laptop to bare minimum and try to reseat the hardware one by one and power on the laptop every time you reseat a hardware, to know the failed one, replace the faulty hardware.
Screen faulty or bad video cable connection; laptop Acer eMachines G640 turns on, but screen is black, with Power led lights ON. Test the laptop with an external monitor connected to the HDMI port, VGA port or display port, press the appropriate key to switch to it. If the external monitor works fine and load the operation system, most likely you have a faulty screen or bad video cable connection. Check them and replace the faulty one.
Laptop Power System has problem: Laptop Acer eMachines G640 won’t turn on at all, probably some electronics components or chipset on the motherboard failed; Disassemble the laptop and take out the motherboard. Look for any burn electronics components(fuse, SMD capacitor and MOSFET …), check chepset temperature (CPU, GPU, Power-Supply IC …), with a Multimeter measure voltages on coils, check for any components shorted to ground, you will need an electronic boardview or Schematic Diagram for Laptop Acer eMachines G640. The failed electronic component has to be replaced.
Read (How to test Laptop Power System).
(Electronics components failure will be updated every time we fix this laptop)
BIOS failed; Laptop Acer eMachines G640 won’t turn on at all, if the Power System and electronics components on the motherboard are good, there is chance you have failed BIOS, reprogram or replace the BIOS chip.
Motherboard dead; The Acer eMachines G640 motherboard has to be replaced.
For other Acer eMachines G640 problems check the comments or write a comment.