My guess is this...
before you power them on... open them up. Do not have the GCT plugged in of course. Look at the Caps... the weak ones look "bloated"- they are not FLAT on the top. The ones that seem to blow are the bulging ones. Also, your battery may be weak or dead as well. It is a standard MoBo battery CR 2032. Radio Shack and CVS have them for 3+ bucks. CyberGuys has a 5 pack for $2.99!!
Anyway, DO NOT turn on the GCT without the metal cover over the CAPs. DO NOT HAVE YOUR FACE, EYES, ETC. NEAR THE CAPS WHEN YOU TURN ON YOUR GCT! THEY BLOW UP! Contents are toxic and are not good to get on you. If they blow... turn off the GCT and look at the CAPS (wearing safty glasses etc) some may be bubbling. Wash your hands if you handle anything. and use a paper towel etc.
I will look at what the CAP ratings are... if anyone knows off hand please post as well. It looks like I finally have an excuse to buy the Cold Heat Soldering Iron... This project NEEDS the Cold Heat Soldering Iron for the CAP replacement... ;) ;) Nudge Nudge!