HP Pavilion Slimline - Stuck On HP Logo Screen At Boot

Hello Experts!

Had a client bring me an HP Pavilion Slimline s5-1414 desktop.  When PC boots, it is stuck on the HP logo screen.  (see photo below)

Screenshot at boot
Here is what I have tried already...without success:

Replaced the CMOS battery
Removed and reseated RAM (one stick installed)
Ejected CD tray at boot (found this tip on a Google search)
All components removed (graphics card part of motherboard)

Note that a USB keyboard does not get recognized, (I think), because I can't get numlock or caps keys to show indicator lights.  So since I don't have a keyboard, F2, F8, F11, F12 do not work.  Can't seem to get to BIOS.

Don't hear any beeps at boot.

Sometimes I have to unplug the AC cord 5-6 times before I can even get to the HP logo screen.

Warranty expired.

I'm thinking motherboard is dead.

Thoughts\advice\solutions?

THANKS in advance!
Mick
snake454Asked:
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dbruntonQuid, Me Anxius Sum?  Illegitimi non carborundum.Commented:
>>  I'm thinking motherboard is dead.

Most likely.  If the keyboard isn't working and getting to the BIOS is impossible then dead seems to be it.

You could try disconnecting CDROM drive and hard drive from motherboard and see if that makes any difference but dead seems to be the word.
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snake454Author Commented:
Thanks for replying dbrunton.

Couldn't remember if I tried disconnecting CDROM, so I just tied that.  No luck...still stuck on logo.
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rindiCommented:
Besides the board, it could also be a bad PSU, so you could try changing that. Look at the electrolytic capacitors on the mainboard, are there signs of them bulging, cracking or leaking? Bad caps are a common issue that causes this type of behavior.
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dbruntonQuid, Me Anxius Sum?  Illegitimi non carborundum.Commented:
Hmm.

Try unplugging the Mem Card Reader at the device itself.

Advice pinched from http://www.tomshardware.com/forum/256184-28-pavillion-start-bios-info-start which goes into much more detail than the single line above.
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snake454Author Commented:
rindi

I don't have a spare PSU, but do have a PSU tester.  I'm thinking PSU is good because fans spin and light on back of PSU is green.  I'm going to "veer" away from that path for now.  May pull it and plug it into my tester tonight.

No, MB looks good.  No "scorched earth": caps and everything look normal.

dbrunton

Sorry, forgot to mention initially that I did try unplugging mem card reader at the card not the MB per that link you sent.  I found the same link prior to posting here and have tried all those suggestions.
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nobusCommented:
you can use the minimum setup, as described here, for troubleshooting :
http://www.experts-exchange.com/Hardware/Components/Motherboards/A_1945.html                  (Short-overview-of-how-to-troubleshoot-bad-hardware-when-a-pc-does-not-post)
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Danny ChildIT ManagerCommented:
The PSU can still be "working", but not producing acceptable voltages on each of its rails.  However, may be hard to replace if it's a specialist model as it's a Slimline case.  Definitely worth testing though.

And, have you booted without the hdd attached?  Wondering if a failed item there is stopping the BIOS sequence...

Have any of the other components been tested in other machines?
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snake454Author Commented:
Thanks to you all!!!!

My client has elected to replace the computer.  It's a Windows 8 OS and she always hated it.  Can't say that I blame her.

I told her that my diagnosis was a bad MB, and that a used replacement would run $ 100 - $ 130 + shipping, sales tax. and my labor.  Further advised that that the MB was my "best guess" but that I couldn't absolutely guarantee that a replacement board would fix the problem.  (You never know for sure)

So I guess we will never know.  I work mainly with business clients and this PC is a pretty weak I3 with 1 or 2 GB RAM.  I can't see buying a MB myself and reselling it to a business client.  1) It's Windows 8 (probably Home), and 2) it just doesn't have enough horsepower to do a good job.

For the record, I did pull the hard drive and could read it when attached to my bench PC.  Drive tests on my PC indicated that the drive's health is fine.  My client does not care about any of the data on that drive so she is moving on and so am I!

Thanks again to all that answered.  Going to award points to dbrunton because he\she was the first to post a response...which pretty much agreed with my initial diagnosis.

Mick
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