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Intel Dual Core - Dead
DV2500 model number and of the DV2000 Special Edition series that exhibits power problems. The indication of power problems were shown by the ring-light on the DC Jack. Since the LED uses the +5v line this points to a problem in the low power section of the unit. There were no other symptoms other than not powering on, or rapidly shutting down.
Sections also controlled by the +5v
- Power ON Button
- LED's and panels
- DC Jack Power indicator (ring light)
After close examination, found that the USB port was shorted. This was a clear visual short. PIN 1 is +5v for the USB which is Vcc or 5v for powering device that is plugged into port. With a dead short the power controller (usually a MAXIM IC) will not allow the rest of the unit to turn on. Though making troubleshooting a little more challenging, it protects the motherboard from additional damage as well as other parts.
Remove damaged USB port
Clean solder holes
Replace USB port