line on Screen and Freezing on iMac G5 2Ghz

swapped hard drive , booted,but froze when warmed up.
caps looked good,but havent test it.
do?
in oven!
now,one line disapeared second still here.no freezing.have them running movie on youtube bad spencer , terence hill (307toni307 @ youtube)
hard drive runs on tiger plenty software on,but firefox , no safari.cant install safari.dont know yet why.
have second imac 1.6 ghz , bad caps,but no solder ion strong enough change caps.may fit mirror glas in frame , forward rest ebay or what.
seems i,no think mistake leave door oven open.may have second time,but im on right way,...i think

 

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