Ok excuse the obscure highlights the red bits are what to me look like cracks the yellow is the flow as it is and the pink looks to me like it should have flow but doesn't due to the cracks as you have bypassed with the wire. Hope that makes sense but im sure you have done a continuity test right?
The two upper red bits are not cracks, they are just the lacquer starting to wear away/or been scratched. There's continuity there as well, so even are they are small bits of damage, they aren't effecting the circuit.The lower red circle was a crack and had no continuity, hence the bypass with the wire, as that track should be connected to gnd via that cap, which is is now.
They wouldn't effect start anyway. Start is bypassing them to go to gnd through the cap, as it's set now, if they were broke (they are not), select would not work. Start would still be fine as it has a path to gnd through the wire.
Continuity is fine across everything now, the gnd pad of start has continuity to gnd, just refuses to work . Other side of start has continuity to the ic leg it is suppose to. Should work, but does not

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