EliteBook 8740w Numlock and Capslock led flashing 5 times

My Elitebook 8740w Mobile Workstation 17inch
ATI Fire pro 1gb
Ram 4gb
Hard disk 320gb 7200rpm
When I turn it on, the machine hangs up at startup showing HP logo, and I can listen to fan noise as well, and after 15-20 seconds capslock and numlock leds combinely start flashing 5times in group and then after 1-2 seconds the flashing repeates and it goes on about 3 times and system remain halted.
After many attempts the system boots up, but it happens everytime I turn on my PC.
What is the problem and what could be the solution?

Hi
Is there any external device connected to you unit. If yes request to disconnect the device and then power on the unit.
Let us know how it goes!
"I work for HP."
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Regards
Manjunath

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EliteBook 8740w Numlock and Capslock led flashing 5 times

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