Computer won’t turn on but is getting power

[CD19]

Computer has been in storage for about 5 months the power light on the back is on but when I go to turn it on the power button light flashes 3 times 

[Riddle_Decipher]

@CD19

Welcome to our humble abode, the family and tech-friendly house of HP Forums!

I'll be your host for the day, they call me the Riddle_Decipher.

I've reviewed your post and here's what you need to do:

• Check with an alternate power cord/adapter or another wall outlet, remove any surge protectors and connect directly to the wall outlet and check if that works.
• Does the issue persist with the battery alone or even when the device is connected to the wall outlet? please verify.
• Have you had any thunderstorms lately, before this issue occurred?
  • If yes, this could be a hardware malfunction that requires a repair.
  • If no, try the below steps:
    • The best way to resolve the issue is by using the HP Guided Troubleshooter: CLICK HERE FOR STEP BY STEP GUIDE.
  • (simply select your description of the issue from the bottom of the screen to gain access to the next set of steps that should resolve your concern).

Keep me posted,

For I (Or a trusted colleague) shall follow-up on this case to ensure the concern has been addressed, and your device is up and running again if you don't get back to us 😉 

that said, If the information I've provided was helpful, 

give us some reinforcement by clicking the solution and kudos buttons, 

that'll help us and others see that we've got the answers!

Good Luck.