In a message dated 97-05-27 23:56:45 EDT, you write: If when you boot the machine it comes up with Apple IIe then you have an enhanced IIE. If it says Apple II then you have an unenhanced IIe. Part of the enhancement upgrade involved replacing roms on the motherboard so perhaps the upgrade was done improperly (unlikely). Pulling cards is the best way to isolate the problem. First pull the videx card. If that doesn't solve the problem then pull the AE card, the mouse card and finally the printer card. If your still having problems then you may want to replace the Zip chip with a stock 65C02 (an enhanced IIe uses a 65C02 rather than a 6502). If you still have problems then you may want to try a different controller card or just throw the thing out the window. :-) Lou