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- No Video
July 1, 2006, 5:17 am
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to get it back. Upon doing a normal "reboot" from the desktop, with no
programs running, the computer went thru the startup sequence but did not
display anything on the monitor. Dead blank. I took the computer down,
opened it up, reconnected the video cable (vga) to the video port built in
to the mother board. Still no video output. I removed all of the boards on
the pci buss, fired it up again, still nothing. Checked all the voltages
from the P.S., all good.
I thought that even if no operateing system was present,that the bios would
still put up text, or give access to the bios info, assumeing that the
motherboard was good. Is this wrong? If that is correct, then I must have a
clobbered motherboard? How can I tell? If the bios is bad, isn't it pretty
much the same thing? I changed out the cmos battery, old battery reading 3.0
volts new battery reading 3.3 volts, still no help. I need an idea here
because I think this thing should work and it aint. Any help would be
Re: No Video
Yes, you do not need an operating system at all for the
system to display video, and POST before booting to an OS
(if you happened to have one on a bootable device).
You might have a clobbered motherboard, or possibly the PSU
still (voltage readings can detect some problems but not
necessarily, comprehensively judge one fit for use.
Try unplugging it from AC, using the motherboard clear CMOS
jumper or removing the battery for 10 minutes.
A bios doesn't generally go bad, without some kind of
significant external event such as a static discharge
through it, which wouldn't easily happen if the system had
only been used, as described.
Examine the motherboard for failed capacitors. If you have a
spare PCI video card, try installing it. Disconnect all
non-essential parts, leaving only video, CPU, 1 memory
module and heatsink/fan.
What make and model are the motherboard and power supply?
Re: No Video
Not clear if you mean it sounds like its booting up fully or not.
Not clear if you are implying that it was originally connected to
a video card or not. If it was, you have a more serious problem
than if it was always connected to the built in video on the mb.
No, that is correct. You should see something on the screen
before the OS is even loaded, at least the bios text etc.
Not necesssarily. It could be a bad monitor or even a bad video
cable or connector tho the last two generally show something.
See if the monitor can display anything by running it unplugged from the
PC and see if the setup on the monitor puts anything on the screen.
If it doesnt, try a different monitor. Then try
a video card if you didnt use one originally.
If it doesnt appear to boot up fully, just with
no video, the motherboard could well have died.
Does it beep with no cards and no ram ?
Its rare that that dies by itself.
Nope, you may be able to reflash it.
That shouldnt produce that effect.
Re: No Video
Have you tried a known good video card? This will tell you whether it is
the video chip or something else on your motherboard.
If it is the video chip, a video card could salvage the system. Otherwise
you will probably not be able to replace your motherboard with an exact, or
close enough new motherboard, and will end up buying a motherboard,
processor, and memory.
Win98 vintage video cards are likely to be in your spare parts drawer, and
if not. they are cheap to buy.
If you are not getting anything at, all have you swapped monitors and video
cables to eliminate that? That is easy to do, and you say that you have
several Win98 systems, so you have got them on hand.
Re: No Video
Yeah, unlikely to fail in a way that produces no video with either
a video card or the onboard video, tho I spose it might get so
screwed that it cant switch back to using the onboard video now.
You sure that there isnt a jumper to use onboard video ?
There was with some of those that old.
No evidence of that.
Looks more like you cant get it to use the
onboard video anymore for some reason.
Check again that there isnt a jumper for that.
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