Quadra 650 transistor casualty

[elemenoh]

The battery in this Quadra 650 wreaked a decent amount of havoc, including rotting off one of the nearby transistors at D4. Can someone identify what type it is? Any other tips for restoring the affected area?

 

[Bolle]

Those are diodes. Usually a 1N914 is used around the battery.

If you are not going to put in a battery you can just leave out that diode.