Re: New PC worked initially, but now won't power up
- From: "Kev" <kbd@xxxxxxxxxxx>
- Date: Thu, 2 Dec 2010 19:39:24 +1000
If the POST LED display is off, that can be for a couple reasons.
The LED display may lack power (perhaps +5V), or it may be blanked.
Sometimes, the driver for a device like that, has a setting to
cause all the segments to go off. At least on classic POST displays
(the kind you buy as a PCI card and plug in), those initialize to
0xFF or 0x00, and the LED should be lit on one of those as long
as power is available. And a real PCI POST card, sometimes has separate
glowing LEDs, that indicate the major power rails are available.
(A POST card, with four LEDs monitoring the main power rails. This one
would read 00 or FF, even if the processor wasn't running. Values other
than 00 and FF mean the processor is reading BIOS code.)
Tools like this would be a bit too specialist for me, as I am not really
into PC building in a big way. This is only my third build; my last one was
in 2006 and before that 2002. By the way, my first 2 PCs were built around
Epox motherboards which had similar post code LEDs. Epox now appears to
have dropped out of the motherboard market.
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