Quoted from pins4u:You have damaged U20 on the MPU. Get that mod OUT first, then address the fault. Leaving the mod in place is going to compound and confuse your fault finding efforts IMO.
Get the mod out? Like take all the led lights out??? I don’t think that’s necessary in this case. May have caused damage installing while powered on but now that they’re all installed, it no different than going back to the incandescent ones. Rest of advice seems like a good place to start