HP Probook 4515S won't start/turn on

hudichk

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May 14, 2014
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4,510
Hello.

I have a problem with my HP Probook 4515S. It won't start or should I say it won't turn on.
It still shows some signs of life so I have a feeling it's not completely dead.

HOW IT STARTED:
- I left it on the table, plugged in (battery doesn't work). It felt into SLEEP mode. It stayed like this over the night.
- I started it in the morning, wouldnt show anything on the screen, you could just hear CPU and FAN noise. No BIOS beeping.
- I plugged it off, opened it, cleared CMOS and replaced the MB battery, also took hard drive out and made a backup. I've also deleted hibernation and pagefile files on the HD. Don't ask me why, I don't know.

SYMPTHOMS:
- when pressing PWR BTN, nothing happens
- when pressing button next to it with mail and clock icon - PWR BTN light turns ON and LED light next to DC jack is blinking orange (fast, I think it's 12 times). Then it stops and PWR BTN light turns off. That's it. Nothing else happens no mather which button I press during this process.

WHAT I'VE ALREADY TRIED:
- like mentioned before, I've cleared CMOS
- I tried the holding power button and tooking out the battery trick
- took out each RAM and tried to run it with only one and also with no RAM at all
- ordered a replacement DC power jack cable and replaced it

None of this did the trick so far.

Any idea what could be wrong and how could I repair it?
 

Ashir

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Oct 5, 2011
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18,560
Check memories on another laptop with a memory checker like the one included with the Windows 7's install DVD, or with Memtest86+, included in Hiren CD.

Other than that... not so much to try. The sympthoms suggest a dead MB or a fried CPU.
 

Ashir

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Oct 5, 2011
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18,560


A dead CPU will get you no beep on POST... on most laptops.

Dead RAM will get you a coded beep on post, on any good laptop brand.