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HP G62-340US Laptop with mainboard P/N 592809-001 boot failure

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HP G62-340US
Microsoft Windows 7 (64-bit)

Laptop will not boot up. Black screen, flashing capslock key.  I have tried all the options of pressing the power-on button with no battery, etc.  Nothing changes.  I tried holding the Windows key and B key while powering up with no battery and just the power adapter plugged in.... didn't produce any new results.  I read where an expired CMOS battery could be the problem; I removed the CR2032 battery and replace it with a new battery.... no change.   It appears the MB has either a solder problem within the board, or possibly a Graphics chip problem.  I have not been able to find what a "blinking caps lock" key (every 5 seconds)  is indicating.  Does anyone know the answer?  

Kahn Chaddock
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@kahnc 

Software failures will generate on-screen messages, usually about not finding an Operating System or not being able to boot. When the screen is blank, the PC is experiencing a major hardware failure.
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If the CapsLock key is blinking or there is beeping, read this HP information on the likely cause of the hardware failure based on the blinking or beeping patters.

For laptops, this HP thread describes the different blink and beep codes: https://support.hp.com/us-en/document/c01732674?jumpid=reg_r1002_usen_c-001_title_r0001
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To determine the cause with hardware failures, you have to be able run diagnostics. We have no way of accessing your PC from here, so we can not do that for you. You have to do it yourself.

You do this by pressing the Esc key repeatedly when rebooting and then, when the HP Startup Menu appears, selecting Diagnostics (usually F2) and letting it run.

If it is NOT possible to run diagnostics, or if that does not work, then there is NOTHING more you can do by yourself -- and there is NOTHING we can do because we have no way of accessing your PC from here to run diagnostics or repair hardware.

You will need to have the PC physically examined in a service facility by folks that can run their own diagnostics to determine what is wrong with it.

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If your PC is still under the original one-year HP warranty, or if you have purchased an extended warranty from HP and this is still valid, then having HP do this is an inexpensive option for you. In that case, you should contact HP Customer Support to see about having it repaired or replaced under warranty.

To contact HP Support see the following link to create yourself a case number:
Step 1. Here is the link: https://support.hp.com/us-en/contact-hp
Step 2. Enter Product number or select to auto detect
Step 3. Scroll down to "Still need help? Complete the form to select your contact options"

Case number and contact information appears.
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If your PC is no longer under warranty, then it will cost you up front to have HP examine your PC. If you want to do that, you will have to contact an HP Repair or Service Center to see if they can examine the PC to determine the cause(s) of the problems, if it can be repaired, and an estimate of the repair costs.

Since you live in the U.S., here is a link to the HP Service Repair Centers:
https://www.service-center-locator.com/hp-hewlett-packard/hp-hewlett-packard-service-center.htm

If that link does not get you a useful page, then use the main HP link:
http://www8.hp.com/us/en/contact-hp/ww-contact-us.html

Good Luck

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***Please mark Accept As Solution if my post solved your problem***

I am a volunteer and I do not work for, nor represent, HP
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Thank you for getting back to me so quickly.   I appreciate your remarks.  I  had previously found the pages you referred me to in your post.  I know that the motherboard will probably require a replacement.  In my research I found that this particular HP model  laptop has a major flaw: the units fail to power on with all the same symptoms.  Many, many have the same problem!

It would seem to me that the HP design of this model had the same failures after the warranty had run out. Some shortly after the warranty expired.  I have found other laptops with graphics chips failing, and they appear to exhibit similar symptoms.  I would like to try doing some re-soldering of the graphics chips to see if that would correct the issue.  

Kahn Chaddock
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