Pavilion dv6-3100sa black screen_beeps15x but never starts-HELP! [Closed]

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Dear kioskea team and anyone out there, pls help!
I can't get my pavilion dv6 start running.
Have already tried to unplug, remove battery etc.
When I press power button, it starts, Caps lock button keep blinking and beep goes off for 15
Times each time.
15 shot beeps, Caps lock button keep blinking in blue, also F11+F12 light are on in orange.

Tried to connect external monitor, no info on the screen either.
Have no idea what to do next, can this be fixed pls?
Thanks in advance for ANY ADVICE

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Hello

Can you describe the beeps? How many? Short? Long? Short and long? How many of each?
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Hi Ambucias ,
Thank so much for trying to help me! Appreciated.
15 short beeps on each attempted start up.
Also caps lock button keeps flashing in blue, F11+F12 orange lights are on.
Have u come across such an issue?
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There is no description for 15 short beeps in any HP knowledge banks, however is seems to me to be a memory issue.

Try this:

If the computer can access part of the memory, it might be possible to access the BIOS Setup Utility display and perform a memory self-test to identify other memory issues. If the computer cannot boot to the BIOS Utility, try removing and reseating the memory and the hard drive, and then repeat the following steps to perform the memory self-test.

Plug the AC adapter into the computer.
Turn off the computer.
Press the Power button to start the computer and repeatedly press the f10 key to enter the BIOS Setup menu.
In the BIOS Setup Utility, use the Right Arrow or Left Arrow keys to navigate through the menu selection to locate the Diagnostics .
Use the Down Arrow or Up Arrow keys to select Memory Test .
Press Enter , and then Yes to perform memory test.
After test completes, press f10 key to Save and Exit , and then press Enter key to Exit Saving Changes .

If the test fails, one or more of the memory modules might not be seated properly. Check for and reseat loose memory modules.