Quoted from terryb:Agree on borygard and chrishibler.
Clip the leads off and then from the top pull on each lead with a pair of pliers as you heat up the joint. Then go back and clean up the solder.
https://pinside.com/pinball/forum/topic/terrybs-soldering-guide-part-1
Personally I would try to troubleshoot a little more using Leons's test ROM and a logic probe. It's always best to solder as little as possible.
Just to clarify I would not use the word "pull" - if the solder is sufficiently melted, the leg will practically fall out on its own; all you're doing with the pliers is guiding it out. If the solder is not sufficiently melted, pulling is going to damage the thru-hole or trace.
I'm sure you know this personally but it sounds like OP is not used to desoldering IC's so some clarifying language might be in order.
Richard
Branford, CT
