Solved

is my MoBo bad?

Posted on 2011-02-14
8
384 Views
Last Modified: 2013-11-08
I have an HP a6000 desktop computer (consumer-grade pc) and the video went out on it.  I've tried different monitors.  The motherboard integrated video controller has two outputs, VGA and DVI.  I've tried both, and with both when the monitor is plugged in it just goes black, I can't even access the monitor menu.  

My first thought was "bad video controller" so I put in a PCI video card with a DVI out.  When I connect my monitor to the video card, same result!  I thought this was strange.  

Am I dealing with a bad motherboard?  Or is there some kind of manual switch on the mobo to disable the integrated video controller?  I can't access the BIOS because the only thing that ever comes on screen is black.

0
Comment
Question by:mattbiel
8 Comments
 
LVL 14

Expert Comment

by:athomsfere
ID: 34892325
Are you getting any lights or beeps from the system?

Have you tried clearing or restting the BIOS?
0
 
LVL 23

Expert Comment

by:edbedb
ID: 34892454
It could be the MB but more likely a bad power suply. I would test or replace it.
0
 
LVL 31

Accepted Solution

by:
Frosty555 earned 500 total points
ID: 34892786
There's no switch or jumper to disable onboard video. The system will typically put priority on a PCI video card if both onboard and PCI exist.

If the system isn't showing anything on the screen it is an indication of either a failing motherboard, a corrupted bios (which you can't easily fix so call it a failed motherboard), failing or poorly seated RAM, poorly seated CPU (if you haven't touched the cpu this likely isn't the problem), or a failing psu.
0
Complete VMware vSphere® ESX(i) & Hyper-V Backup

Capture your entire system, including the host, with patented disk imaging integrated with VMware VADP / Microsoft VSS and RCT. RTOs is as low as 15 seconds with Acronis Active Restore™. You can enjoy unlimited P2V/V2V migrations from any source (even from a different hypervisor)

 

Author Comment

by:mattbiel
ID: 34892847
I am getting no beeps from system.  Starts up as normal.  Fan turns on, power light turns on.
I've tried reseating RAM and only using one (tried each as a single).  could it be the power supply if the fan and lights turn on?  

Frosty, thanks for confirming, I thought that priortiy would automatically go with PCI video card.  I guess I'll just replace the computer.  I'm gonna leave this open for a day to see if anyone else has any miraculous ideas.

mb
0
 
LVL 23

Expert Comment

by:edbedb
ID: 34892865
That's what I said, it is most likely the PSU. You don't need a miracle, a new PSU will probably do the trick.
0
 

Author Comment

by:mattbiel
ID: 34893766
edbedb:  I'm just confused, I don't know much about power supplies.  I have had them go bad before though, and when they go bad the computer won't turn on, it's just completely dead.  In this case, everything turns on except the video!  Is it possible that a bad power supply would supply power to the fans and the lights but not the on board video?  I always thought that if they were bad, nothing would power up.
0
 

Author Comment

by:mattbiel
ID: 34894309
bought a new power supply, did the same thing.  Returning the power supply and buying a new machine.  Thanks guys.

0
 
LVL 23

Expert Comment

by:edbedb
ID: 34894634
A bad PSU will more often do what your system was doing than not work at all. It wont have the power needed to fire up all the peripherals and supply the power needed to get the computer to post.
0

Featured Post

Three Reasons Why Backup is Strategic

Backup is strategic to your business because your data is strategic to your business. Without backup, your business will fail. This white paper explains why it is vital for you to design and immediately execute a backup strategy to protect 100 percent of your data.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
USB ports 4 43
Samsung Tablette 22 70
trying to format an ssd 7 34
SMPS issue 1 38
As cyber crime continues to grow in both numbers and sophistication, a troubling trend of optimization has emerged over the last year.
Arrow Electronics was searching for a KVM  (Keyboard/Video/Mouse) switch that could display on one single monitor the current status of all units being tested on the rack.
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

713 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question