Dell Inspiron E1705 laptop won't turn on

[sixfourcop]

  I have a Dell Inspiron E1705 laptop (out of warranty) that will not power up. When I press the power button, the power light goes on for just a few seconds, then goes out. No fan noise, nothing on screen, nothing period. In one of the forums I read to push the Fn button while pushing the power button, then holding. When I do that, the 3 LED lights (at top, the 3 LOCK lights) go on briefly, then go out. I have removed the battery, checked it (it's fine) just used AC power, just used the battery, nothing works. I am suspecting that maybe the internal power board is fried or possibly the power button circuit board is fried. When I took it to my neighborhood computer store, it worked fine (twice!). I am at my wits end. Can someone help me? Thanks for your time.

[ale52]

Define "...it worked fine".

Alan <><

[Allan]

Define "...it worked fine".

Alan <><

Yes, are you saying that it works normally in the computer store but not in you home?

[sixfourcop]

Update: I just took it to the computer geek, and it did not work at all. He seemed to think it was the motherboard or a part (mentioned in my previous post) on the motherboard. I 'm just wondering if I can get 1 part replaced or have to replace the entire moboard?

[Allan]

It's probably easier & cheaper to replace the entire mobo. You can order it from Dell and do it yourself.

[sixfourcop]

  That is what I guessed. The geek also said that or buy a new laptop. Anyway, thanks for the reply.

[Computer_Commando]

Exactly the same thing happened to my Dell laptop.  Motherboard cost too much, so sold the whole thing for parts.