My Computer will not turn on No matter what.

[Danielatheer]

So I unplugged my power supply cable and left my pc for a year then I put the power supply cable back and turned it on but when I pressed the power button it would not turn on and I searched youtube but nothing worked my computer is windows 7 64 bit and here's the model hp-pavilion-p6200-desktop-pc-series 

[itsmyname]

@Danielatheer -- it could be a dead power-supply It could be a dead motherboard. It could be a dead CPU. It could be a bad power-cord. Some desktop computers have an "off/on" rocker-switch near where the power-cord connects to the power-supply -- check that the rocker-switch is not set to "off".

[Danielatheer]

I did those steps they didnt work but my computer was working like 1 year ago i do not understand whats going on.

[itsmyname]

@Danielatheer --  my computer was working like 1 year ago i do not understand whats going on

Since those "simple" trouble-shooting steps did not resolve the issue, and because I am guessing that you are not familiar with disassembling a computer to do some "part-swapping", e.g., "try a different power-supply", I recommend that you take your computer to a qualified computer technician, and pay them to trouble-shooting & repair.

[Danielatheer]

they said the repair was unsuccessful. 

[itsmyname]

@Danielatheer -- they said the repair was unsuccessful

Don't shoot the messenger.

How much money did they charge you?  Did you set a limit on the invoice for the repair,

e.g., "if your cost for your time exceeds 1 billable hour, stop trying" ?

Did they say what component was "unrepairable" ?

Hopefully, you can physically remove the disk-drive, to keep a copy of all your Personal Files.

Attach that disk-drive as a "secondary" disk-drive in some other computer, and copy your files.

[Danielatheer]

They charged me 600 dollars and my whole computer was unrepairable Please man help This is my last computer

[itsmyname]

@Danielatheer -- they charged me $600 

Ouch!  That is a huge amount of money.

I found this web-page: Hewlett-Packard HP Pavilion P6000 Series - Geekbench Browser

where they reviewed the P6000 series in September 2012 -- almost TEN years ago.

If that is the approximate age of your computer, then "20/20 hindsight" suggests that your $600 should have been invested in a brand-new computer that run Windows 11, instead of Windows 7.

Sigh.

[Danielatheer]

that is not my computer age. 

Spoiler

idk what age it is but that is not the age.

[itsmyname]

@Danielatheer -- that is not my computer age. idk what age it is, but that is not the age.

Hmm.   Can you please clarify?

Try this:

1. Hold-down the Windows key (bottom-left of the keyboard)
2. Type "R"
3. Release the Windows key
4. Into the input-area that appears, type CMD   
5. press ENTER
6. into the window that opens, type   DIR    C:\     /A     /O-D       
7. press ENTER

Note: type as many "spaces" between the above words as you want. 

What are the dates of the last few folder-names that are listed?

Some of the dates may correspond to the date/time on which you most-recently installed Windows.

That might infer to you an indication of the minimum age of the computer.