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I've got a 5 year old ASUS, Windows 7, 64 bit laptop.

  • When I Press the power button, the buttons green light turns on.
  • The display stays black, no display, not even a flicker.
  • The fan does not turn on immediately, but after a few minutes starts spinnning.
  • The CD Rom drive clicks once.
  • I can hear the HD spinning.
  • Pressing Caps lock does not turn on the CAPS LED.

Recently, I left it on for about 36 hours, then noticed that it was at the desktop. As long as the laptop was left on and prevented from hibernating (a few days), it worked great.

After it lost power, we left it on for 2 days, no display. Tried rebooting, again and again, days go by... nothing.

Yesterday, turned it on and noticed about 2 hours later that the desktop was displaying.

  • I've tried swapping out the RAM, with known good RAM.
  • I've tried swapping out the HD, with known good HD.
  • I've taken out the CMOS battery, left it out, and replaced.
  • I've verified the CMOS battery has correct voltage (3v).
  • I've tried plugging an external monitor into the VGA port to verify it is not a display issue. No display on external monitor either.

The only thing left I can think of is a BIOS issue... but how to continue troubleshooting?

  • bIOS itself no; the CMOS battery maybe; yeah you verified the battery you have; The behavior you describe doesn't match up to a corrupt bios thoigh – Ramhound Jan 15 '15 at 1:21
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    Might be a race condition at bootup; see oddballupdate.com/2012/04/… and tomshardware.com/forum/37345-63-windows-stuck-screen, although their descriptions do not match your description exactly. MS also released an update that conflicted with existing Avast! installations. Another possibility is an intermittent connection; if cooling (in refrigerator) or gently heating (on a heating pad) improves things temporarily, then solder may need to be reflowed (see computerrepairtips.net/how-to-reflow-a-laptop-motherboard). – DrMoishe Pippik Jan 15 '15 at 2:57
  • @DrMoishePippik This sounds exactly like my issue (solder). I'll give these options a try tonight. Mmmmmm..... baking a motherboard! – adam Jan 15 '15 at 14:13

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