Compaq C500 laptop won't turn on. When I plug in the charger the charge LED lights solid for just a millisecond, then flickers.I completely disassembled the unit, down to the main board. I removed the charger port from the unit and plugged the D/C charger into the port. I then checked for voltage at the plug (that connects to the motherboard). I get a solid 19 VDC. I reassembled the laptop and tried powering up without RAM, then without CMOS battery, then without main battery. Either way I still get the same thing. I plug the D/C charger in the port and get a solid charge LED for a millisecond before the charge light starts to flicker fast. There is always a small hesitation before the LEDS flicker. Lastly, I hit the power button when the LEDs were solid and unit tries to power up. As soon as the system fan turns on, it stops and the LEDS start that fast flickering. I tried holding the power button on and then it starts flickering too, but no system fan or anything else. BTW, this is a new D/C power supply. Any ideas?