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Honor Student
Posts: 3
Member Since: ‎06-11-2010
Message 1 of 6 (831 Views)

HP Pavilion a1000n occasional boot up problems

About half of the time the system boots up and runs normally.  The rest of the time when you press the power button it gets to the blue "HP" screen and stops.  When this occurs I notice that the lights on the keyboard for "num & cap" locks will not come on, so this tells me that the keyboard is not getting power.  Once this happens I can turn the power off and on many times but cannot get it to boot.  But I have found that if I unplug the power cord wait a couple of seconds and plug it back in then the system boots up and runs normally.  Could this be a power supply issue?  Any ideas?

 

Thank you.

Mike

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Posts: 22,442
Member Since: ‎07-17-2009
Message 2 of 6 (829 Views)

Re: HP Pavilion a1000n occasional boot up problems

Try this procedure:

Unplug the PC and open it up. Clean out all the dust. Carefully remove and replace all the cables going to the motherboard one at a time. Do the same for the memory dimms and the video and sound cards if you have any. Plug your PC back in a give it a go.

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HP DV9700, t9300, Nvidia 8600, 4GB, Crucial C300 128GB SSD
HP ENVY 17t Touch,i7-5500u,16GB, 256 GB SSD (on loan)
HP Photosmart 6520
HP Touchpad, HP Chromebook 11
Custom i7-4790k,Z-97, 16GB 2400 mhz, Vertex 3 SSD, Plextor M.2 SSD, Samsung EVO SSD, Corsair HX650, GTX 760TI
Windows 7/8 UEFI/Legacy mode, MBR/GPT
Honor Student
Posts: 3
Member Since: ‎06-11-2010
Message 3 of 6 (826 Views)

Re: HP Pavilion a1000n occasional boot up problems

Thanks Dave;

 

I did clean it out and reset all cables and memory thinking that something may have come loose.  After doing this I thought I fixed it but after a few reboots it locked up again.  Anything else I can try?

Provost
Posts: 22,442
Member Since: ‎07-17-2009
Message 4 of 6 (816 Views)

Re: HP Pavilion a1000n occasional boot up problems

Boot into the bios and run some diagnostics for a while.

---------------------------------------------------------------------------------------
HP DV9700, t9300, Nvidia 8600, 4GB, Crucial C300 128GB SSD
HP ENVY 17t Touch,i7-5500u,16GB, 256 GB SSD (on loan)
HP Photosmart 6520
HP Touchpad, HP Chromebook 11
Custom i7-4790k,Z-97, 16GB 2400 mhz, Vertex 3 SSD, Plextor M.2 SSD, Samsung EVO SSD, Corsair HX650, GTX 760TI
Windows 7/8 UEFI/Legacy mode, MBR/GPT
Honor Student
Posts: 3
Member Since: ‎06-11-2010
Message 5 of 6 (810 Views)

Re: HP Pavilion a1000n occasional boot up problems

Hmmm. i don't want to sound to dumb but how do you run diagnostics in the Bios?  I know how to get into the Bios and change the settings but not how to run a diagnostics.

Provost
Posts: 22,442
Member Since: ‎07-17-2009
Message 6 of 6 (790 Views)

Re: HP Pavilion a1000n occasional boot up problems

Once in the bios, look for an advanced settings tab. Each tab is scrollable.  Many PCs have bios diagnostics but perhaps your PC is the exception if it doesn't.

---------------------------------------------------------------------------------------
HP DV9700, t9300, Nvidia 8600, 4GB, Crucial C300 128GB SSD
HP ENVY 17t Touch,i7-5500u,16GB, 256 GB SSD (on loan)
HP Photosmart 6520
HP Touchpad, HP Chromebook 11
Custom i7-4790k,Z-97, 16GB 2400 mhz, Vertex 3 SSD, Plextor M.2 SSD, Samsung EVO SSD, Corsair HX650, GTX 760TI
Windows 7/8 UEFI/Legacy mode, MBR/GPT
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