Hello, I bought this programmer in Ebay from a Chinese seller. From the beginning the programmer dont burn my M2764 and other. Internal hardware test says "O.K.". All EPROMs are o.k. and so I believe that the unit is defective. Burning time is few seconds only and is ending at adr. ~3F8. I have no guarantee and dont know manufacturer to ask for schematics or service manual. What can/should I do?