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disconnect both battery cables and short them together for about 10 or so minutes... this will drain the memory back up so that it wont remember a thing... when you do reconnect, you will notice the jeep will run a little crazy at first.. it's just the computer try to sync up to all the functions... your check engine light should also be out as well... so give the computer time to make it's own adjustments... I own a Jeep and have done this already and so far it works for me and mine is a 98 Grand Cherokee... Good Luck!! Voiceofthenight001@yahoo.com
Try this to get it at-least back on with your PSU that fits in the case.open up yourcomputer case, locate your power supply. With the AC cord still plugged in , unplugged the connectors to your motherboard from the PSU and wait about 10secs. Then replugged them in. This should power on your PC. Also, You wanna check around where the PSU connects to the motherboard and make sure there is no damage. No burning,Discoloration anything that could be potential damage.
Hope this works atleast to get the PC booting up.
To fix the problem, you need to disassemble the power supply, replace
the burnt out fuse, & also check the bridge rectifier section for
burnt out rectifying diodes (these usually get burnt out if the high
current gets the chance to leak past the fuse, which could sometimes
happen). If you find burnt out rectifying diodes, you will need to
replace them as well, as they could burn out the fuse again when you
try to use the power supply while they are still there.
1. Remove all USB devices such as printers, mp3 players etc etc.
2. Remove the power-cable and the battery
3. Press and hold the power button for 30 seconds
4. Put the power-cable back in but not the battery and none the USB devices.
5. Turn the computer on
Also check the condition of the USB ports if it doesnt work and the fuse. If this doesnt work then I would recommend a repair.