Re: [SLUG] No Post screen

From: Eben King (eben01@verizon.net)
Date: Wed Jul 22 2009 - 23:51:19 EDT


On Wed, 22 Jul 2009, Paul M Foster wrote:

> On Wed, Jul 22, 2009 at 11:15:46PM -0400, Bob Stia wrote:
>
> <snip>
>
>>> I've only intermittently followed this thread, but now that you say
>>> "DVI", my ears prick up. DVI is a real pain in this area. Analog is much
>>> easier and more forgiving. DVI seems to just give up if it doesn't get a
>>> proper signal when it wants. I think it's some sort of sync issue. I
>>> have a Windows machine and Linux machine, both with DVI cards, hooked to
>>> a KVM which allows me to switch between them as needed during the day.
>>> My Linux box never actually blanks the screen (screensaver), but the
>>> Windows box will, after a short timeout, stop sending a signal to the
>>> monitor. And I've had a devil of a time occasionally getting Windows to
>>> wake up and send the monitor a signal.
>>>
>>> Again, I haven't followed the thread completely, but if it's been doing
>>> this for years on both analog and digital monitors, I'd suggest a
>>> different video card. I think you can find a cheapo NVidia for $40. I'm
>>> doubtful about it being the power supply or BIOS.
>>>
>>> (This advice isn't even worth $0.02, so don't complain! ;-)
>>>
>> Oh, I certainly won't complain. Any thoughts from the Sluggers is always
>> welcome. Question though, what actually sends the signal? The video card?
>> Even before boot up, for the Post screen?
>
> Well, the signal hits the monitor from the video card, and since you can
> *normally* see a POST screen before boot-up, it's gotta be the BIOS
> kicking the video card to make it talk to the monitor. But this really
> doesn't sound like a software problem to me.

It's not software you can change without an EEPROM or FPGA burner (and the
BIOS source code) at any rate.

> It sounds like a hardware problem. Especially when your test today shows
> the computer is POSTing, but you're just not seeing it.

Check the motherboard manual. Maybe there's something to do with video
modes there.

-- 
-eben   QebWenE01R@vTerYizUonI.nOetP   royalty.mine.nu:81

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