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NO SIGNAL

post #1 of 43
Thread Starter 
Background:

1) The computer I am building is for a high-school student. Compared to the hundreds of computers I have built over the years, it’s a bare-bones “Model T”. Nothing complex. Just a motherboard, CPU, Stock AMD heatsink, fan and backplate, RAM, DVD burner, basic video card, and only one 1TB Western Digital hard drive.

2) As someone who has both studied and taught Symbolic Logic for many years, I am of course familiar with logical problem solving: Truth tables, Decision-tree Logic, Process of elimination, etc. – and have tried all of these multiple times.

Problem: I cannot even get to the BIOS! All I ever see on my monitor is “No Signal”.

Attempted Solutions:

1) I have interchanged two Cases – one of which was “almost new” and one of which was brand-new out of the box.
2) I have interchanged 3 brand-new Corsair PSU’s all of which I tested first on 2 PSU testers.
3) I have tried both an ASUS and Gigabyte motherboard – both of which are relatively new and have been tested in other computers I own.
4) I have interchanged two sets of 8 GB (4 X 2 GB) Corsair RAM – one set of which I had used successfully before and one more of which I purchased “just in case” RAM was the problem.
5) I have interchanged two AMD CPU’s – an AMD 4-core and an AMD 6-core, both of which I had tested and used in other computers.
6) I have interchanged (reinstalling with Tuniq TX-2 thermal paste) each time the two AMD CPU’s with several stock heatsink/fan combinations and backplates. I even ordered brand-new AMD backplates and tried those after I had tried (and failed with) several that were stock and almost never used!
7) I have interchanged 3 video cards, 2 stock VGA cards out of the box and one rather expensive ATI graphics card (runs 4 monitors) out of one of my working (for a long time) computers – just for testing purposes.
8) I even interchanged 2 ACER 22 inch monitors.

Now you may have noticed the repetitive use of “interchanged”. That is intentional. I have literally tried every combination of the above: 2 cases, 3 PSU, 2 motherboards, 3 heatsink/fan/backplates (multiple installs), 2 AMD CPU’s, 2 sets of RAM, 3 video cards.

Trust me, sports fans, I am nothing if not thorough. When I say I tested every combination of the above (all new and/or tested components), I mean I tested every combination in exhaustive “truth-table” combinations.

Trying only to get into the BIOS (not asking much here), I reduced everything to Bare Bones, even attempting to get to the BIOS without DVD ROM or WD HDD.

Once again, compared to my other “take over the world” complex computers, this one that I am building for the kid is just a bare-bones POS (excuse me) Model T computer – the likes of which any Village Idiot could throw together.

Why then am I getting, time after time, “No Signal” on my monitor (and, yes, everything powers up, all fans run, yadayadayada.

I have invested at least 100 hours of work and many sleepless nights with this problem, and I don’t give up easily. Actually I don’t give up at all. So coming to you guys is downright “head-down” humiliating.

Please, any suggestions are welcomed.


Tra'On's Computer Problem.docx 16k .docx file
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post #2 of 43
well the only thing you have tryed is a diffrent vga cable
post #3 of 43
Tight connections? (You probably did this but ya never know) Is this PC near any high voltage/output appliances?

Did you connect through on board graphics on both boards?
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post #4 of 43
did you plugg it in ?? lol jk.. you need a little comedy... probably not but hmm. two board.. 1 cpu..

two different bios batteries and still no post.. have you tried a different cpu with either board?
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post #5 of 43
Quote:
Originally Posted by Jaxis View Post

did you plugg it in ?? lol jk.. you need a little comedy... probably not but hmm. two board.. 1 cpu..
two different bios batteries and still no post.. have you tried a different cpu with either board?

See #5.
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post #6 of 43
that sucks 100 hours, could of bought the lil guy a computer with tha kind of time.. i really hope you figure this out... i know in the past i've stared at something for too long and just put it away and come back a few days later and noticed my error. the odds of having two faultly board isnt likely but it isnt impossible.. any way you can get your hands on another board?
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post #7 of 43
i dont get it.. did you change every time just one component and try it? or was it two at the same time you interchanged!?
if you even changed boards, ram and CPUs.. there was NO COMBINATION that worked?!?!?
this is very odd.. somehow i´d tip on a mix of 2 or even more components making it not boot.

i have another idea .. take a working rig, and replace it part by part with the rigs parts youre building for this student..
it should be easy to find out from whitch component change it wont work anymore.. GL
post #8 of 43
That's pretty extensive, I can't see that any of the components are the issue. Sounds like it's something to do with the monitor. My first guess would be what truckerguy said or does the monitor have multiple inputs? Maybe select the input you want on the monitor?
APU what?
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APU what?
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post #9 of 43
How about attempting a safe mode boot (I did not see if you tried this) and a motherboard outside the case boot.Have you used this board and gpu combo before? I had an issue with a low end Intel board DG31PR and a 9800GX2,never could get it to boot..One last strange thing I have come across.With an ASUS M4A79T-Delux I always got the "no signal" message if the aftermarket cpu cooler was screwed down tight, not too tight in my mind also.Do a quick boot attempt with the HSF and backplate off (with the board outside the case).Shut it down quick if you see it is booting.
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post #10 of 43
Thread Starter 
Quote:
tryed is a diffrent vga cable

Thank you, Trucker Guy. I thought of and of course tried that. When I said that I had even switched ACER monitors (taken off of two working computers), I neglected to add that I had switched cables as well.

Thanks though.
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