Laptop Won’t Turn On, Power Button LED blinks slowly

[Darth_Imperius]

Originally the problem started with my laptop turning off after I put it in sleep mode, so I stopped putting it in sleep mode. A couple days later, it stopped turning on normally; I had to perform a hard reset to turn the laptop on. After having to do this twice, I simply stopped turning my laptop off, but after a week of being on it would start to run a little hot, so I would turn it off.

After I did this for about two weeks, a hard reset no longer allowed me to start my laptop. Instead when I press the power button the power button LED blinks and continues to blink about every 5 seconds.

I have been able to get the laptop to boot two more times since then by unseating and reseating the CMOS battery, and one additional time after replacing the CMOS battery. After this point I have been unable to boot the computer regardless of reperforming the above steps.

TL;DR

- Laptop won’t boot

- Power cord connection LED steady light

- Power Button LED blinks every 5 second

- No other lights, beeps, or any other signs that the laptop is attempting to boot

- Peripherals connected to the laptop receive power

What I’ve attempted:

- Hard Reset

- Boot without battery

- Reseat CMOS battery

- Replace CMOS battery

- Checked Power Supply with a voltmeter, touch over 19V, which is SAT

- Opened up laptop and cleaned out dust with pressurized air, checked all cord cord connections, and performed an amateurs visual inspection (no obvious signs of damage or failure

Lastly, I intended to try and reset the BIOS to default settings when I was able to get it to boot again, but no luck so far.

[CherylG]

A 1 blink- pause- 1 blink- pause usually indicates cpu or motherboard failure. The HP chart lists cpu failure but seeing posters try replacing cpu over the years often with no change makes me suspect it is actually the cpu socket on motherboard.

https://support.hp.com/us-en/document/c01732674

[Darth_Imperius]

That’s what I was afraid of. I didn’t expect a motherboard failure after 4 years, but it does match the symptoms. Thanks.

Edit: The link you provided referred to the Caps Lock light blinking. My Caps Lock light doesn’t blink at all, the power button light blinks with the light at the power cable connection point is on solid.

Not sure if that makes a difference at all.