no video/ motherboard issue

October 18, 2010 at 18:15:43
Specs: Windows 7, 2.933 GHz / 4094 MB
HP Pavilion Slimline s3020n Desktop PC / Won't start

This computer will not display any video. I power it on and the green light in the front flashed around 14 times and then it turns off. The light on the power button stays solid blue and that's all it does. It appears as if the video port on this motherboard is defective which might mean I need another mother board:? any advised on what I can do to troubleshoot this computer?

http://h10025.www1.hp.com/ewfrf/wc/...


See More: no video/ motherboard issue

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#1
October 18, 2010 at 23:52:07
when u press the power button do u hear anything(fans spinning or beeps)? If u don't hear anything try to swap psu.

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#2
October 19, 2010 at 21:36:30
oKAY,

So far this is what i've done.

I tested my known working video card on this mobo still no image, i disconnected cd rom, tested with 1 ram module, switch from ram slot, tested with different hard drive same issue! no image whatsoever! I did notice that the hard drive light was blinking orange as if it was loading the os!

Still don't know why my video card wouldn't work :/


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#3
October 26, 2010 at 06:42:36
i bent the pins on my cpu while trying to remove it and put it back in. I was able to straighten them but now i'm afraid i have damaged the cpu :/ it powers back on but now when I connect everything it tries to power on but it doesn't. I disconnect one of the power cables and everything powers on but still no signal.

Before everything look to be starting and the flashing amber light as if something was loading would come on now this is no longer happening :(

Did i damaged the cpu or could it still be a bad psu?


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Related Solutions

#4
November 15, 2010 at 05:49:41
I replaced the mobo and it worked fine three times now it will kinda turn on but then it turns back off. What should I do?

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#5
November 15, 2010 at 08:26:20
"HP Pavilion Slimline s3020n"

I troubleshooted a friend's same model as yours a couple of weeks ago. The situation with that one was it would not boot at all.

Eventually I found the problem - failing capacitors in the PS.
Apparently, this is a common problem with the s3xxx series in general.
Failing power supplies often partially work, fans and hard drives may spin, leds may come on, yet you may get no video and the mboard will not boot all the way.

Open up the PS box. Look for failed capacitors. You may need to cut wiring ties in order to be able to see all of them. If you see failed capacitors, you need to replace the power supply.

The following is about defective electrolytic capacitors on mboards - failing or dead power supplies often have the same problem.

Some mboards develop this problem - electrolytic capacitors were installed on them that were not properly made, and they fail eventually - the mboard manufacturer didn't know they were improperly made at the time the mboard was made.

Open up your case and examine the mboard to see if you have bad capacitors, and/or other findable signs of mboard damage .

This was the original bad capacitor problem - has some example pictures.
History of why the exploding capacitors and which mboard makers were affected:
http://members.datafast.net.au/~dft...

What to look for, mboard symptoms, example pictures:
http://www.badcaps.net/pages.php?vid=5
Home page that site
- what the problem is caused by
- he says there are STILL bad capacitors on more recent mboards.
http://www.badcaps.net/

Pictures of blown capacitors, other components, power supplies, Athlon cpu's, etc.:
http://www.halfdone.com/Personal/Jo...
......

If you do have one or more defective capacitors, use the HP part number that's on it's stuck on label on the PS on the web to search for replacement PSs that will fit for sure inside your case. They are available in the same meagre capacity, or you can get ones that have up to 300 watts capacity for a bit more money.

It's NOT a sure thing to try repairing the PS by replacing the failing or failed capacitors. All capacitors that have the same brand markings as the one(s) that failed should be replaced, because they're just as likely to fail in the future, and even if you do replace them, the PS may already be otherwise damaged, and you may still not have a properly working PS.
.......

If you have, or think you might install in the future, a PCI-E video card in the PCI-E slot, get a 300 watt PS. There are some, but not many, video chipsets on small form factor cards that will work fine if your system has a 300 watt PS, but very few that will work in the long run without the PS failing eventually with a lesser PS capacity.

Your power supply must have at least the minimum capacity required to support a system with the graphics card you are using installed, or the max graphics card you might install in the future.
(Onboard video - video built into the mboard - IS NOT A CARD ! )
If that info is not in the ad for the video card, you can go to the video card maker's web site and look up the specs for the model - often under system requirements - the minimum PS wattage, and, more important, the minimum amperage the PS must supply at 12v is stated. If you don't find that, any card with the same video chipset including any letters after the model number has very similar minimum PS requirements. Some power supplies have two or more +12v ratings - in that case, add those ratings to determine the total +12v current capacity.
.......

Side notes.

There were no signs of failing capacitors on it's mboard.

I wanted to be sure the problem was not the mboard or something connected to it before I ordered a new PS, so I rigged up a custom made wiring adapter so that I could hook up a regular standard sized ATX PS to the system.
The system works fine with that !

If you want details about how I rigged up that wiring adapter,
See response 1 in this, particularly the last part (scroll down). (Your mboard has the MINI 24 pin main power connector socket.)
http://www.computing.net/answers/ha...

.......

"i bent the pins on my cpu while trying to remove it and put it back in."

That was completely un-necessary, if the cpu worked fine previously, the cpu fan still works fine, no one has been fiddling with installing it in the past, and if the heat sink was still clamped to the mboard.
That is one of the least likely things that could have been wrong.
The heat sink is often firmly bonded to the cpu, as if it were crazy glued , and in that case you can't release the cpu socket's lever - you have no choice but to pull the heat sink / cpu assembly out of the cpu socket, possibly bending or breaking off the cpu's pins in the process, or damaging the cpu socket.
What you are supposed to do is to try breaking the bond by unclamping the heat sink, then pressing straight down towards the cpu socket really hard, while twisting the cpu back and forth, but that may not work, especially if thermal compound was used (thermal compound often hardens as time goes by and the bond then can't be broken ).

If you separated the heat sink from the cpu, you must have one of a thermal pad or thermal compound or thermal grease between the bottom of the heat sink and the top of the cpu when you re-install the heat sink. If it had a thermal pad (straight lines at the edges where the pad was) you must scrape off the thermal pad remains on both sides and replace it with another thermal pad (hard to find) or thermal compound or thermal grease (easy to find). I recommend thermal grease because it never hardens - translucent, whitish, almost clear when in a very thin layer - silicon compound with nothing added to it.


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#6
November 15, 2010 at 18:35:47
Wow! thank you very much! It turns out there was a screw underneath the mobo and it was not allowing it to power on... or at least I like to think that was the issue because as soon i removed screw and assemble computer back it all worked perfectly. I hope it keeps working! otherwise i'm screwed :S

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#7
November 15, 2010 at 22:21:15
Hmmmmm....... Where did the screw come from?

Likely


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#8
November 16, 2010 at 04:11:14
it was one of the screws i removed and from the mobo corners... i also reconnected all the cables so maybe that was it :? i really don't know but it seems to be working now :S

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#9
November 16, 2010 at 07:40:02
Hopefully the mboard was not damaged by the screw being there, but only time will tell.
You have two mboards for this ?
If I were you I would examine the inside of the PS.

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#10
November 16, 2010 at 18:25:05
yeah! i ordered a mobo because the original issue was no video at all... i replaced it and everything seems to be working fine :S

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#11
November 16, 2010 at 18:45:35
That's good, but usually when you have no video on a computer there's nothing wrong with the video adapter or the monitor - it's most often something else, rarely the mboard. Failing or dead power supplies are probably the most common cause, and failing power supplies sometimes damage the mboard while failing.
Check the current voltages in the bios Setup - the readings for +3.3v, +5v, and +12v should be within 10% of the nominal values - if any of those are not, you should replace the PS - if any are too high, the mboard is likely to be damaged eventually

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#12
December 24, 2010 at 08:35:59
I don't no if this will help i have to HP Pavilion Slimline s3100n Desktop PC one of them i got a new mother board then i got one off ebay the one that i put the new board worked grate at first then i put it up because i thought it was done a bout 3 months i plug it in and it had no video so now i have to that has no video so i rebuild the ps3 so i com across the no video so i took the cover off the HP Pavilion Slimline s3100n Desktop PC on the mother board i took my heat gun and heated up the video chips and it brought the video back i am having to reflow a lot the one off ebay had the same problem and i fix it to the same way i just heated up the to heat covers on the mother board i got it for 60.00 and now i can sale it for more the fix did not cost me nothing it took to minutes to fix now i have to get the operating system on the formated hard drive i will take the hard drive out of the HP Pavilion Slimline s3100n Desktop PC and clone the drive it should work i hoop i do not want to bay the restore dick it is all in saving money

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#13
January 14, 2011 at 16:56:36
hi there,

can someone help me?!! i have a hp slimline s3620f. as of a few weeks ago it was running fine then im not getting a video signal according to a pc guy. my motherboard looks good, we reseated the memmory, still no video signal. is it possible my 2gb/2gb ram memory burnt out or something? i didnt try the check the power supply yet and what is the heating gun situation?

thanks~!


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#14
January 15, 2011 at 07:29:36
dmb1969

As I said above...

"....usually when you have no video on a computer there's nothing wrong with the video adapter or the monitor - it's most often something else, rarely the mboard. Failing or dead power supplies are probably the most common cause, and failing power supplies sometimes damage the mboard while failing...."

There's usually absolutely nothing wrong with the ram either, if it's the same ram that worked fine previously, or the cpu, unless it's fan has failed.
(If the cpu fan is not spinning, try moving it's blade with something slim - it should move in jumps, but be easy to move - if it's difficult to move, the fan's bearings are in poor shape and it's spinning too slowly, or not spinning at all.)

If the mboard is not booting all the way...

Open up the case, remove the power supply, open up the power supply. See the HP maintenance manual for your model series if you need to.

The following is about defective capacitors on mboards, but the same thing often applies to power supplies, especially the relatively oddball small form factor power supplies. I have recently replaced a HP small form factor power supply that has this problem. You could check the capacitors on the mboard too.

Some mboards develop this problem - electrolytic capacitors were installed on them that were not properly made, and they fail eventually - the mboard manufacturer didn't know they were improperly made at the time the mboard was made.

Open up your case and examine the mboard to see if you have bad capacitors, and/or other findable signs of mboard damage .

This was the original bad capacitor problem - has some example pictures.
History of why the exploding capacitors and which mboard makers were affected:
http://members.datafast.net.au/~dft...

What to look for, mboard symptoms, example pictures:
http://www.badcaps.net/pages.php?vid=5
Home page that site
- what the problem is caused by
- he says there are STILL bad capacitors on more recent mboards.
http://www.badcaps.net/

Pictures of blown capacitors, other components, power supplies, Athlon cpu's, etc.:
http://www.halfdone.com/Personal/Jo...


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