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Need some help with PC not working

coullgfx Avatar
2y, 3m agoPosted 2 years, 3 months ago
When I switch it on nothing is coming up on tv, it was fine yesterday, but for some reason won't work today.

I have plugged hdmi cable into xbox, and get a picture instantly, so I know it's not the cable.

I built the htpc about 2 months ago, all parts new, and has been working fine since new.
It has on board graphics, amd a10 6700

Not sure what to do, I don't really have the means to chop and change parts etc
coullgfx Avatar
2y, 3m agoPosted 2 years, 3 months ago
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#1
First things first.

Is the PC actually powering up?

Are the fans working?

What beeps do you get when it tries to post?
#2
coullgfx
I don't really have the means to chop and change parts etc

not many people do, that' s why self builds can be a bit of a nightmare when they go wrong.
Aside from that the basics without testing kit are,

1.unplug from wall
2 remove all non essential items plugged in (usb devices etc)
3. check if fuse has blown in mains cable
restart.
If it doesn't work try gather some clues, do any lights come on? can you try another mains cable..after that its means going inside it to disconnect all drives etc, see fi cpu fan is working, reset cmos and try again.
#3
NEtech
First things first.

Is the PC actually powering up?

Are the fans working?

What beeps do you get when it tries to post?


maddogb
coullgfx
I don't really have the means to chop and change parts etc

not many people do, that' s why self builds can be a bit of a nightmare when they go wrong.
Aside from that the basics without testing kit are,

1.unplug from wall
2 remove all non essential items plugged in (usb devices etc)
3. check if fuse has blown in mains cable
restart.
If it doesn't work try gather some clues, do any lights come on? can you try another mains cable..after that its means going inside it to disconnect all drives etc, see fi cpu fan is working, reset cmos and try again.

Thanks for replies, yes it's powering up, all fans including CPU fan is spinning, no beeps out of the ordinary when booting up, blue power led is flickering as it would normal, it just doesn't seem to be outputting a picture.

I should also add it's been set up to boot straight into xbmc, but usually bios screen appears beforehand, but nothing appears now
#4
remove graphics card if fitted and try on board GPU if available if none fitted try fitting a cheap one to test
#5
R3DD3R5
remove graphics card if fitted and try on board GPU if available if none fitted try fitting a cheap one to test

it only has on board graphics, if I got a cheap or spare one and I then got a picture, would that indicate a faulty cpu, or motherboard?
#6
try re-seating the ram, or if you have more than one stick, try them one at a time, also make sure the cpu fan is working
#7
First I would try pluggin it in via VGA (I assume your onboard card has both) not hdmi, if you get a picture it is more likely a setting via windows.

Also have you tried taking out a stick of memory (providing you have 2 dimms)

I recommend the first option before doing anything, start at the basics
#8
So no bios at all?

Do you have a flashing cursor in the corner of the screen by any chance? Or is it totally no connection getting to the screen whatsoever?
#9
mikey_d
try re-seating the ram, or if you have more than one stick, try them one at a time, also make sure the cpu fan is working

WesD84
First I would try pluggin it in via VGA (I assume your onboard card has both) not hdmi, if you get a picture it is more likely a setting via windows.

Also have you tried taking out a stick of memory (providing you have 2 dimms)

I recommend the first option before doing anything, start at the basics

NEtech
So no bios at all?

Do you have a flashing cursor in the corner of the screen by any chance? Or is it totally no connection getting to the screen whatsoever?

I have only 1 stick of ram, but I do have new ram that I haven't got around to installing, low profile stuff to fit under CPU fan, I will try that tomorrow.
There is no signal to screen what so ever.
I'm not 100% sure if there is a VGA, I will check just shortly! don't even know if I still have a VGA cable kicking around lol
#10
Have you tried a different monitor/tv, can you connect it to a TV by any chance just to check another screen?

I am not clued up on XBMC but I don't think it would have anything to do with your issue, you should still see a bios boot or at least a cursor. That is why I am thinking it has to be a connection issue between the PC and the screen or the screen itself, especially as you say there are no abnormal beeps on boot.

Maybe try connecting via another port (VGA or DVI) as already mentioned by WesD84.
#11
P.S. It won't be your ram, you can rule that out for sure.

A CPU fault can result in no boot but you usually get a cursor hanging on the screen, a ram fault would be indicated in some way or other, but you would get a post for sure if it was a ram fault.

As you get no connection whatsoever it is either your hdmi port goosed, onboard gfx goosed, or your screen goosed. Is your onboard from the processor or the CPU?

Also if it was a faulty hard drive you would see some kind of post.

Edited By: NEtech on Jun 29, 2014 21:36
#12
NEtech
P.S. It won't be your ram, you can rule that out for sure.

A CPU fault can result in no boot but you usually get a cursor hanging on the screen, a ram fault would be indicated in some way or other, but you would get a post for sure if it was a ram fault.

As you get no connection whatsoever it is either your hdmi port goosed, onboard gfx goosed, or your screen goosed. Is your onboard from the processor or the CPU?

I haven't tried a different monitor or tv yet, I will give 1 a try tomorrow, I have just checked though, and there is a vga and dvi port. I will look out a spare cable, and check on my pc monitor.
Hopefully it isn't a goosed port, and I really cant be bothered taking whole computer to bits, and sending away for replacement.
I believe the on board graphics are built into the cpu.
#13
OK, this could be an issue, I have never used a CPU with on board GPU. In the past if a CPU was goosed you would still get some kind of post, even if it is just a hanging cursor.

But considering the the GPU is built into the CPU, if it is goosed then how would it get a post? I don't think it would, but not so sure. A post comes from the GPU, so if there is not post whatsoever then this is something to consider.

So, it could well be the CPU. But try the obvious option first. Especially if it was working just the other day, not often a CPU/GPU just dies like that without any warning signs in the first place.
#14
NEtech
P.S. It won't be your ram, you can rule that out for sure.

it could be as the onboard graphics uses the system ram as its memory
#15
Does your DVD tray open, strange that you don't receive any beeps which makes me think its more of a connection error rather that internal hardware, CPU,RAM, Internal graphics would still produce Beep errors if they were at fault, definitely not a source out issue on your tv? you could force bios to appear by removing your cmos battery
#16
mikey_d
NEtech
P.S. It won't be your ram, you can rule that out for sure.

it could be as the onboard graphics uses the system ram as its memory

Never knew that, as I say the CPU/GPU is something I have never used. However if it is a memory fault then even on board CPU/GPU would post first, meaning you would see a post on screen of some sort, then post a fault with the ram in some form or other.

At least that is how I would see it.
#17
So is there no ram at all built into these cpu/gpu hybrids? If so then it could be an issue.
#18
NEtech
mikey_d
NEtech
P.S. It won't be your ram, you can rule that out for sure.

it could be as the onboard graphics uses the system ram as its memory

Never knew that, as I say the CPU/GPU is something I have never used. However if it is a memory fault then even on board CPU/GPU would post first, meaning you would see a post on screen of some sort, then post a fault with the ram in some form or other.

At least that is how I would see it.

You wouldn't get any graphics at all as the gpu would have no memory if the system ram was faulty
#19
mikey_d
NEtech
mikey_d
NEtech
P.S. It won't be your ram, you can rule that out for sure.

it could be as the onboard graphics uses the system ram as its memory

Never knew that, as I say the CPU/GPU is something I have never used. However if it is a memory fault then even on board CPU/GPU would post first, meaning you would see a post on screen of some sort, then post a fault with the ram in some form or other.

At least that is how I would see it.

You wouldn't get any graphics at all as the gpu would have no memory if the system ram was faulty

Yeah I realised that mate on my after post. ;)

Edited By: NEtech on Jun 29, 2014 22:58
#20
NEtech
mikey_d
NEtech
mikey_d
NEtech
P.S. It won't be your ram, you can rule that out for sure.

it could be as the onboard graphics uses the system ram as its memory

Never knew that, as I say the CPU/GPU is something I have never used. However if it is a memory fault then even on board CPU/GPU would post first, meaning you would see a post on screen of some sort, then post a fault with the ram in some form or other.

At least that is how I would see it.

You wouldn't get any graphics at all as the gpu would have no memory if the system ram was faulty

Yeah I realised that mate on my after post. ;)

There are so many things it could be that its probably not the ram anyway, its just that its one of the easier things to check so its worth trying it first
#21
ok, got another clue, don't know if it may help, just got up for work, checking news etc, on my normal pc. decided I would check if I can still network share with htpc. So I have switched it on, and checked network, but it is not appearing at all.

Would that suggest that it is not booting into OS then? Could it be a faulty boot drive? Or still more likely a faulty CPU?
#22
It cant just be a faulty boot drive as you would get an error on the display.

Have you tried reseating the cpu?
#23
Got it working for now, i connected it to pc monitor using dvi cable, it came up with a blue screen saying something about an error, it then asked me to system restore, which didn't work.
i then had option to boot windows anyway, and it appears to be working now.

all set back up in living room on tv.
i don't know what initial problem(s) were, is there any checks or anything you might recommend?
#24
trott3r
It cant just be a faulty boot drive as you would get an error on the display.

Have you tried reseating the cpu?

you can't make blanket assumptions like that, a hdd uses electrical, mechanical and logical systems, a fault in either two of those could cause a non post situation.
statistically this is likely to be a psu fault and that's also the cheapest to test for by obtaining a replacement(out of main PC?) or a tester which is cheaper to purchase but less likely to give a %100 conclusive result.
#25
maddogb
trott3r
It cant just be a faulty boot drive as you would get an error on the display.

Have you tried reseating the cpu?

you can't make blanket assumptions like that, a hdd uses electrical, mechanical and logical systems, a fault in either two of those could cause a non post situation.
statistically this is likely to be a psu fault and that's also the cheapest to test for by obtaining a replacement(out of main PC?) or a tester which is cheaper to purchase but less likely to give a %100 conclusive result.

Agree with this, I've had a couple of faulty hard drives which have stopped the machine from posting
#26
maddogb /mikey d:

I am surprised but thanks for the info
#27
coullgfx
Got it working for now, i connected it to pc monitor using dvi cable, it came up with a blue screen saying something about an error, it then asked me to system restore, which didn't work.
i then had option to boot windows anyway, and it appears to be working now.

all set back up in living room on tv.
i don't know what initial problem(s) were, is there any checks or anything you might recommend?

You need to find out what the blue screen error was.
If you didnt write it down you will need to have a look through the event logs

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