if the chip is too hot to touch then its more than likely dead but that usually only happens if you put the chip in back to front
is there any sign of spillage on the board anywhere?
if it were me i would reseat all the chips and boards first then read the +5volts on the edge connector(should be about 5.05 to 5.15)
just for information,today i had a daytona board showing a strange grid constantly.
i removed all the boards and washed them in a sink with washing up liquid and a paint brush then washed off with water and then used an air compressor to dry off,it worked a treat