remote control key wont lock or unlock

[Monkey2]

Issue: pressing buttons on fob, red light comes on but nothing happens.

Replaced buttons and battery but still the same. Would work if I pressed hard or if I took the circuit board out of the key and press button with thumb with index finger underneath pressing on the battery.

If I hold the edges of the circuit card and press button does not work. Thought it might be battery connections so I removed the battery holder from the circuit card and hard soldered the battery to the circuit card.

Still did not work unless as I pressed button with thumb while pressing underneath against the lower(flatter) of the three chips on the board. Light bulb moment, with a small tipped soldering iron and magnifying glass I reworked the solder joints on the chip now work first time every time back in the key.

Hope this helps.