2008 Jeep Compass won't start. Lights are bright and radio works; battery jump didn't help. Remote key fob worked last night, but doesn't work this morning.

Just because you charged the battery it doesn't mean it is any good. Modern sealed batteries fail; just as you described, fine one moment and then nothing, they go open internally.

With a voltage meter see how many volts are at the starter terminal. If not 12+ volts you have a bad connection. Check connection at the starter solenoid. Does it have 12+volts? Short the solenoid. Does it put voltage to the starter?

Possible solution - This happened to me and my battery was dead in my key fob and also I needed an ignition switch because a piece on it was broken which therefore wouldn't turn to start the engine.

have a load test done on the original battery as it appears that you have a shorted cell that is draining all the power from the jump battery.

Assuming you have checked all fuses, the next step would be to locate central grounding points (there may be several) and remove and clean battery terminals and the remote ends of the cables at their attachment points.Locating some of these may be easier with a manual covering the electrical system of the car:
Sebring manual
When removing battery cables, always start with the negative cable first and reattaching it last.

electronic key on 2008 jeep cherokee says key damaged or key not programmed. car won't start. some things work but radio won't come on. etc..

Hi Hal,

Did you ever get this resolved? Looks like you didn't get any feedback here! I'm having the same issue sporadically. I turn the key and nothing. Usually if I keep trying it will eventually start cranking and start. Usually within 10 - 15 tries. happened last night. After it started, I got the "Service Security Key" message. I looked in the manual and it does say what that means. Don't know if it is programming (probably not because the fob works 97% of teh time) or maybe just a dying battery. If you can share anything you might have founf out I'd appreciate it! thanks!
Brian

reboot the computer by disconnecting the battery and reconnecting

Clean the battery terminals with a battery brush.