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From: GT on 7 Dec 2009 04:59
"Ken Maltby" <kmaltby(a)sbcglobal.net> wrote in message
news:LY-dnS5DbrWuR5fWnZ2dnUVZ_rOdnZ2d(a)giganews.com...
>
> "GT" <ContactGT_rem_ove_(a)hotmail.com> wrote in message
> news:0040bb77$0$2374$c3e8da3(a)news.astraweb.com...
>> "Ken Maltby" <kmaltby(a)sbcglobal.net> wrote in message
>> news:GrOdnWVExb3Ve5TWnZ2dnUVZ_gGdnZ2d(a)giganews.com...
>>>
>>> "GT" <ContactGT_rem_ov_e_(a)hotmail.com> wrote in message
>>> news:0070a545$0$1824$c3e8da3(a)news.astraweb.com...
>>>> OK, this is a strange one...
>>>>
>>>> Shuttle SK41 motherboard with on-board graphics, plus an old Radeon
>>>> 8500 AGP card (64mb I think). The PC is used for basic kids internet,
>>>> hotmail and watching DVDs. Has been working just fine for ages. I
>>>> recently swapped out the desktop athlon 2400 for a mobile 2500. Cooler,
>>>> quieter etc. Just got a new HD1080 TV in the living room and it is
>>>> connected to that, but had a post last week about it not managing 1080
>>>> from the DVI to HDMI lead (720 is fine). I mention it again now simply
>>>> as it might be related... The PC shut down as normal and refused to
>>>> come on again.
>>>>
>>>> Stripped it right back to Power + Motherboard + either/both of my 2
>>>> sticks of DDR + CPU. With on-board graphics or with the AGP 8500 card
>>>> the PC Posts just fine. no problems reports, but when I press Del for
>>>> the BIOS, or press f1 to continue to a boot screen, the screen goes
>>>> blank and doesn't come back. Machine sometimes responds to
>>>> ctrl-alt-del, so its not dead.
>>>>
>>>> I've tried both processors
>>>> I've swapped the ram sticks over and tried them each on their own
>>>> I've tried with on-board GPU only. With AGP, but using on-board GPU and
>>>> through the AGP card.
>>>> I've reset the bios
>>>> I've removed the CMOS battery and started it up
>>>>
>>>> Nothing makes any difference - same results every time - no video
>>>> signal after a healthy post.
>>>>
>>>> I have not yet crawled round the back to disconnect the cables to try
>>>> it on my monitor upstairs.
>>>>
>>>> Any ideas before I try this?
>>>
>>> It sounds like you are saying that you are getting the
>>> text display, from post, while the card is operating in
>>> the default VGA mode. The description you provide
>>> seems to be saying that your HD TV is providing that
>>> from an HDMI input, and with it set to display at 720p.
>>> Is this correct?
>>
>> Sorry - a rushed post from me. I'm using a VGA cable to test this at
>> present. It is connected to the TV right now, which can handle up to
>> 1300x720 resolution. Until the failure, I could see the post information,
>> boot screen, complete XP loading screens and then XP desktop. I included
>> the information about not getting the 1080 signal over the DVI-HDMI cable
>> just in case it was relevant. I have not been testing using the HDMI
>> cable.
>>
>>> Now while still in VGA mode you lose the display when
>>> going to the BIOS screen or the boot options screen?
>>
>> This is correct.
>>
>>> You talk of an on board "GPU" and making changes in
>>> your use of that and an AGP card. How are you doing
>>> this without access to your BIOS settings? MB Jumpers?
>>
>> I can't get into the BIOS settings, but have reset the BIOS to defaults
>> using a jumper. I assume the on-board GPU is the default. When I connect
>> the VGA cable to the onboard connector the PC uses it. When I connect the
>> VGA cable to the AGP card, the PC seems to switch to it automatically. I
>> can't get to any settings to see what is default/auto etc.
>>
>>> It would be of some help if you would provide the make
>>> and model of your "new HD 1080 TV", that you are trying
>>> to use as a monitor. Could you tell us if you still have these
>>> problems when using a PC monitor?
>>
>> Yes this would have been handy! Its a new Toshiba Regza 40". Full HD
>> 1080p. Manual lists the resolutions accepted and over the VGA cable it
>> can handle just about any resolution up to 1360x768.
>>
>> I will test the computer on a normal monitor as soon as I get a chance.
>>
>>> Luck;
>>> Ken
>>>
>
> OK, until we can rule out the video interface as a source
> of the problem, (by trying it on a normal monitor) there are
> a few other things to rule out.
>
> The first I would normally advise would be trying it with
> all USB devices disconnected, then with no hard drives
> connected (a bad hard drive can throw in unexpected
> problems during post as well as boot), but it appears that
> you already tried that. I bring it up again just in case you
> missed something the first time.
>
> The "Shuttle", being a proprietary system, may have
> "features" that don't follow the normal practices for PCs in
> general. I can't think of anything that would blank the
> screen or crash the video display when going from a good
> display of the post data, to the display of the BIOS screen
> or Boot screen. There should be no change in display mode.
>
> The one logical potential culprit might be the keyboard. You
> mentioned that the "machine 'sometimes' responds" to a
> keyboard input, you could try a different keyboard and try
> changing from PS2 to USB or vis versa.
>
> Luck;
> Ken

An update - I finally found time to unplug everything and take the PC up to
a proper monitor where everything worked just fine. Either the cable I have
downstairs has magically broken, or the TV is not working as a monitor
properly... At least the PC is OK!


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