Acer Travelmate 661LCi trouble

Perform a system recovery:
Acer computer's do not ship with recovery CD's - there is a program that allows you to burn the disks or recover.
3 ways to recover:

1. If in Windows - Start - Programs - Acer empowering technology - Acer E-recovery management -
click on Restore at bottom then "Restore to factory default settings"
2. Or click on Burn disks instead of Restore
3. If unable to boot into Windows then tap Alt/F10 during boot right after Acer splash screen when starting up the computer.
4. This will start the Acer E-recovery program - choose Factory Default Settings and follow instructions.
For Acer end user technical support, spare parts and service: 1.800.816.2237

usually power supply problems, and its most like built on to main board,
sometimes u can replace the voltage regulator (probably the only chip heat
sinked besides the processor) and other such parts but the service techs
will always just change the main board because they want your money and
servicing computer boards gets tricky as they have those extremely small
resistors and capacitors etc.