Having problems with your Dell Inspiron E1505 Notebook ?

Powers on a couple of seconds, then goes off.

\015 When you push the power button the light comes on for a short time then it shuts down. I'm sure it's a motherboard problem but I want to make sure it's not fixable before I buy a new mobo.\015

Answers :

Hi,
\015\012-please try to run the diagnostic on the computer
\015\012-while the computer is off, press and hld the "Fn" key then press the power button at the same time to start the test; if computer powers down after the test initialize; it is a possible motherboard failure
\015\012-to conclude that it is a motherboard failure check the lights on the laptop, it the 3 lights flashes then computer goes off; it is a motherboard problem
\015\012-in addition try to do the test while computer's battery is out of the computer
\015\012-thanks
While it is not simple, you can find the issue... one step ata time... Here is how I fixed it.
First of all I tried simple stuff: remove the battery and start the laptop with AC adapter plugged in. Next. reseat and swap the memory module, remove the hard drive, the DVD drive, the wireless card. Nothing helped to start the laptop normally. After that I went a little bit further. I opened up the laptop case, removed the LCD screen assembly and reseated the video card and… Surprise, surprise, the laptop started fine with an external monitor attached. Just in case I restarted it 3-4 times and each time I got video on the screen. After I assembled everything back, one more surprise was waiting for me. The laptop failed to boot again with the same symptoms. So, the only part that I added before it failed was the LCD screen assembly. I unplugged the video cable from the system board and the laptop started fine again with the external monitor. Now I know that the problem is somewhere inside the display assembly (of course, if the video connector on the system board is fine). The next logical step would be opening up the LCD display assembly and check if all connectors are seated properly. Bingo!!! I wasn’t very surprised, but I was very happy. The video cable was half-way out from the connector on the back of the LCD screen. The laptop started perfectly fine as soon as I plugged the video cable back in place. Fixed!
That was my first experience when improperly plugged video cable prevented entire system from booting.
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