Compaq Presario laptop won't boot...need help.

[BehindEnemyLines]

Just recently picked up a laptop, and it seems to "work", to some extent. Actually, the only thing that works are the ac plug light (on mobo), power light (on LCD), and battery light (on LCD).

When the power button is pressed, only those lights would turn on (of course, that means the laptop is using the ac plug w/ the battery plugged in ). The hd, fan, and lcd screen don't work. They just sit still and do nothing. What's the most common part(s) in the laptop's or desktop mobo that fail?

I'm not sure, but the laptop has a button (or a pushable pin) near the LCD hinge. When the LCD screen closes, the pin is pressed down. Can a defect in the pin cause such problem since it's either constantly closed or opened?

BTW, the laptop is compaq presario (series 700 and model 715us). I believe every other components work, just not the mobo. Many presarios seem to have this problem, so I'm just wondering if anyone has a "fix" for it.

 

[dnuggett]

See my response to the your identical post in the motherboards thread.

 

[jschuk]

This is a common symptom of bad memory (bad chip(s), not seated right, or bad slot). You could also try reseating the CPU. The lid switch on most older laptops (> 2 years) will simply turn off the LCD, but will still allow the laptop to turn on and boot. Most newer models won't let you power on thje unit with the lid switch stuck down. Back to the CPU, I just read a bulletin that some models may have a cracked CPU (with the serial number xx2BxxxxMxxx). Another one states that the processor may become unseated (configurations KDHB, KKH5, KKH6, KDKM, or KDKN).