|Acer Aspire laptop, Windows 7, on mains power (battery light not on so the power is getting through). |
The laptop screen is dark, when any key is pressed the display returns for about 1/2 second then goes dark again. The computer is processing OK.
Connecting an external monitor: 1st time; display on monitor was fine.
2nd time, display on monitor going on and off as on the laptop screen.
Switched laptop off and on; monitor and laptop display both on. Laptop now working fine with external monitor.
Any suggestions as to what could be causing the problem please?