here is the update I ohm checked all pins on ic 22 every thing except for ground and power supply was ether ol/infinity or above 1000 ohms. I checked all pins with o-scope and most were 5 volts no signal some were a little lower like 3.5 or so except for grounds that were 0 the chip gets hot in about 30 seconds so I have to test a couple pins and let cool. I am thinking the chip ic22 must be bad/shorted. but can I take this chip out of socket and test the board? should I have voltage on the data lines with the chip unpluged?
thank you all for any help
Ken