Pavilion dv7-4177nr Blink Code?

[Radarx2z]

I was given a HP Pavilion dv7-dv7-4177nr laptop to work on.  The reported problem was intermitten display function.  Obviously the laptop had been dropped and the hinge was no longer secured on the left bottom as you face the display.

When I power on the laptop, there is no beep, nothing displays on the internal monitor nor on an external monitor if connected.  The LED on the power button glows steady white, the power and disk activity LEDs on the right side are on steady.  On the keyboard the f12 key has a stedy amber LED on and the Caps Lock key blinks white about every three seconds.  No other keyboard keys light or blink, including the Num Lock.

Is this blink on the caps lock key a blink code indicating a bad CPU?  Everywhere I've seen blink codes it mentions the caps lock and num lock both blinking and that isn't the case here.

Thanks for any enlightenment.

[KNRK]

Dear Customer,

Welcome and Thank You for posting your query on HP Support Forum

It looks like you are trying to get clarity with regards to the  blink code for your Notebook

We will surely assist you with this regard

Please find the information you are looking for as shown below:

LED Blink 1 time : CPU not functional - Replace Processor

LED Blink 2 times : BIOS Corruption failure - Replace System board 

LED Blink 3 times : Memory error not functional - Replace Memory Module

LED Blink 4 times : Graphics controller not functional - Replace either System board or Graphics card

LED Blink 5 times : General System board failure - Replace System board

LED Blink 6 times : BIOS Authentication failure - Replace System board

Note: It is recommended to power drain  & swap with a known good Memory Module before replacing the part

Hope this helps, for any further queries reply to the post and feel free to join us again

 **Click the KUDOS star on left to say Thanks**

Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.

Thank You,

K N R K

I work on behalf of HP

[Radarx2z]

It took me a while to get parts and get back to this.  I'm still looking for a solution.

In the mean time the battery went dead on the unit and after charging the battery up I decided to to a reset by 1) removing the battery and AC adaptor power, 2) holding down the power button for 15 seconds, 3) reconnecting the AC adaptor and powering the unit up.  It booted up and ran.  But when I powered it back off and then on again it is back to the blinking caps lock button.  I tried the reset process again but just got the blinking caps lock button.

After the above, I tried swapping memory as suggested in the pervious post.  Same result(blinking caps lock).

I've disassembled the unit and reassembled it looking for something out of place, loose connections, damage caused by the broken hinge forcing the case apart, etc.  I can't seem to see a cause.  The unit appeared to be indicating bad CPU, then it all worked, now again it is apparently signaling bad CPU.  Does anyone have any suggestions for other things to look at or try?

Thanks!

[KNRK]

According to the message you have recently posted I would like to confirm that this could be a hardware issue and I strongly recommend you to immediately Contact HP Technical Support over the Phone for further assistance without any delay to get your Notebook diagnosed and serviced by an authorized HP Certified Engineer

You can also Check your warranty Here to verify the warranty status

Hope this helps, for any further queries reply to the post and feel free to join us again

**Click the KUDOS star on left to say Thanks**

Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.

Thank You,

K N R K

I work on behalf of HP