its prob a vtec converted ecu like a P06,P29 etc
could be just a bad solder joint or just bad component on the enabled vtec circuit.

ecu just looks dodgy in general from that one pic anyway
put up a pic of the top left hand quarter of the ecu board
if i was u,i would just dump it & find a factory vtec ecu like a p30 or even chip a p28,p72

contact ECU-MAN,i do believe he has some spare socketed vtec ecus available