Hi all. Have been searching all over for help. My 20" iSight G5 iMac won't start. Already tried: Removing power cord Using other power cord Inserting power cord while holding down power button Holding power button for 6 secs+ Plugging cord to wall outlet Begging and praying to the mighty white apple I would really really appreciate ideas or suggestions; will take it down to the shop on monday, but it's out of warranty (almost 4 years old...) so... Thanks!