Tony's not going to be pleased :-) I wouldn't recommend it either. If it were me, by the time time I got to the next problem, I would have forgetten what jumpers I put where that might have caused it. Ideally, I would suggest finding out what the jumpers do, figure out how they might affect the problem in hand and what other problems they might cause. It is possible that some of them should actually be there but were removed by a previous owner following a similar approach to problem solving :-) Consider removing the added jumpers one by one to determine which ones provide some improvement, leave the rest out and then stick a note to yourself about them inside the case. The single question marks are non-fatal errors and the double question marks are fatal errors. In a combination of vague recall and guessing, I think that E and D are probably due to the lack of battery and indicate problems with the real time clock and non-volatile storage. C refers to the serial interfaces and I think you get an error because one can't be tested as you are using it as a console. B refers to the memory. This is probably the only error of consequence. 7 and 6 refer to the SCSI buses and I think you get a fatal error if they are not terminated and a non-fatal error if there are no devices visible on the bus. 1 refers to the network interface and you get a fatal error if there is no network plugged in to the selected connector. (F would refer to the monochrome frame buffer if this was a VAXStation and 4 would similarly refer to an optional colour graphics card.) Regards, Peter Coghlan.