My comp turned off by itself & now it won't turn back on

i was using my pc and it turned off by itself and wont turn back on i've tried everything but it wont turn on

Product Description - Acer Veriton M464 - Core 2 Duo E7300 2.66 GHz
Type - Personal computer
PSU - 250W
Form Factor - Micro tower
Dimensions (WxDxH) - 18.3 cm x 45.5 cm x 37 cm
Localisation - United Kingdom
Processor - 1 x Intel Core 2 Duo E7300 / 2.66 GHz ( Dual-Core )
Cache Memory - 3 MB L2 Cache
Cache Per Processor - 3 MB
RAM - 2 GB (installed) / 4 GB (max) - DDR2 SDRAM - 667 MHz - PC2-5300
Storage Controller - Serial ATA ( Serial ATA-300 )
Hard Drive - 1 x 640 GB - standard - Serial ATA-300
Optical Storage - DVD-RW
Monitor - None.
Graphics Controller - NVIDIA GeForce 7050
Audio Output - Sound card - 7.1 channel surround
Networking - Network adapter - Ethernet, Fast Ethernet, Gigabit Ethernet
OS Provided - Microsoft Windows Vista Business / XP Professional downgrade
OS Preinstalled - Windows Vista
Manufacturer Warranty - 1 year warranty
5 answers Last reply Best Answer
More about comp turned turn back
  1. First unplug it from the wall, press the power button a few times to make sure it'll be a "cold" boot. Next plug it in again and try starting again.

    EDIT: you said you tried "everything". What do you mean by this? If you let us know what you've tried, we can start ruling things out.
  2. sorry i forgot what the matter was exactly the pc did turn on but didn't display anything and there was no startup sound or vibration
  3. Best answer
    That sounds awfully familiar with Acer desktops... Usually it indicates that the motherboard is dead. You could try swapping out RAM and/or the graphics card. If that doesn't fix it, I'd consider the mobo dead.
  4. try removing nd reinserting ur graphic card if still dosent work try connecting to d basic onboard VGA
  5. His GPU is an onboard VGA. The Geforce 7050 is a lowend built in card.
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