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PC starts but no display


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#1 stringjunky

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Posted 11 August 2016 - 08:07 AM

PC: HP Pavillion 23 AIO b010ea

 

OS: W10

 

Specs: http://h20564.www2.hp.com/hpsc/doc/public/display?docId=c03527351

 

Not sure if this is a software or hardware problem so please move if it is deemed to be software related.

 

Computer has been starting up normally until this morning. All the normal  startup sounds are there; a click is heard and the fan starts and remains running. There is usb power as well as I can charge my phone still. There is the faintest flickering on the screen that occurs periodically so it appears that there is power to the monitor (it's an ALL-In-ONE).

 

I have reseated the single RAM card and reseated the CMOS battery.


Edited by stringjunky, 11 August 2016 - 03:55 PM.


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#2 KB0

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Posted 11 August 2016 - 04:01 PM

Can you see the BIOS splash screen before it attempts to boot into Windows?

 

Do you have the mobo with the soldered graphics or can you use the PCIe slot?

 

Also, that click sound (if new) could be a sign the hard drive is having issues.


Edited by KB0, 11 August 2016 - 04:08 PM.


#3 stringjunky

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Posted 11 August 2016 - 04:10 PM

Can you see the BIOS splash screen before it attempts to boot into Windows?

 

Do you have the mobo with the soldered graphics or can you use the PCIe slot?

 

Also, that click sound (if new) could be a sign the hard drive is having issues.

No, there's nothing displayed at all.

 

No idea about the soldered graphics.



#4 KB0

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Posted 11 August 2016 - 04:43 PM

Does the hard drive activity light continue to blink for a period of time that would indicate you might have booted into Windows but you just can't see the visuals?

 

Alternatively, do you know what key to depress to get you into the BIOS when the splash screen is supposed to appear (usually a few seconds after power on)?



#5 KB0

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Posted 11 August 2016 - 04:55 PM

This may help:

 

HP All-in-One Desktop PCs - Computer Starts but Monitor/Screen Remains Blank

http://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c03561545-4



#6 stringjunky

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Posted 11 August 2016 - 04:56 PM

Does the hard drive activity light continue to blink for a period of time that would indicate you might have booted into Windows but you just can't see the visuals?

 

Alternatively, do you know what key to depress to get you into the BIOS when the splash screen is supposed to appear (usually a few seconds after power on)?

It turns out that the problem was with the BIOS, as I think you suspected already, and resetting it blind, without seeing the display, using instructions from the HP site solved the problem. Here's the link:

 

http://support.hp.com/us-en/product/HP-Pavilion-23-All-in-One-Desktop-PC-series/5295897/model/5311866/document/bph04760/

 

 

I used this link within that page and followed its instructions:

 

http://support.hp.com/us-en/product/HP-Pavilion-23-All-in-One-Desktop-PC-series/5295897/model/5311866/document/c02217843

 

 
Thank you for your time. :)

Edited by stringjunky, 11 August 2016 - 04:59 PM.


#7 KB0

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Posted 11 August 2016 - 04:57 PM

Glad you got it fixed. Nice work!



#8 stringjunky

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Posted 11 August 2016 - 05:06 PM

Glad you got it fixed. Nice work!

Yeah thanks. It's a close shave as it's my sister-in-law's computer that I'm using whilst she's away and Sod's Law says it has to go AWOL on me now! Don't need the moaning from her. :)



#9 stringjunky

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Posted 12 August 2016 - 01:40 PM

The problem returns when I restart the computer. It's as though the BIOS doesn't remember the reset. Any ideas?



#10 Jahkyah

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Posted 12 August 2016 - 02:02 PM

That sounds like the CMOS battery is dead.

 

The CMOS battery keeps any hardware configurations you've made in the BIOS persistent. 

 

Without it, the memory will be gone and will be converted in to the BIOS defaults.

 

I would check on to see if the CMOS battery is present. 

 

It will look like a button cell battery.



#11 hamluis

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Posted 12 August 2016 - 02:05 PM

I would replace the CMOS battery.  Worth A Look.

 

Louis



#12 stringjunky

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Posted 12 August 2016 - 02:30 PM

Thanks guys. I've ordered a new battery. We'll see how that goes.



#13 stringjunky

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Posted 18 August 2016 - 06:27 PM

Changing the battery allowed the display to come on at start without me messing about to bring it up. Thanks Guys. :)






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