I haven't looked at the schematics extensively, beware all the same that the series bulb itself isn't causing the shutdown.
If you switch back on repeatedly does it glow as bright every time?
Other components that would be worth checking are:
R5528, R5530, R5518, R5522, Q5512, R5519.
R5514, Q5508, Q5509, D5504, D5505 and equivalent in negative side.
There is very little chance anything got damaged further back by the power transistors blowing.