I have an HP G7 laptop which has a dead battery. The laptop stopped booting which, when I checked with a local computer repair shop was due to the internal system reporting the laptop going to sleep with not enough power in the battery to restart. When I removed the battery and powered up on mains power alone it worked a charm... for a while.
Now replaced the battery and when I power up the power light comes on, the fan spins and the CD drive activates but the system does not start to load and the screen stays black. No sign of the Hard disc dirve being accessed. Any thoughts from the collective experts?
Disconnect all peripheral devices and remove all USB devices and SD media cards. Disconnect the AC power adapter, remove the battery, and then press and hold the power button for at least 15 seconds to drain all residual power and restore default startup settings.