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#amiga won't work

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#34360From: Don Curtis/SYSOPSep 25, 1986 10:24 PM
Tan, NO, you don't have to keep if off for 5 seconds and no you can't destroy a Write Protected disk by taking it out of the drive (although you can destroy a non-write protected disk by taking it out of the drive if it is being written to). The reason for the 5 second suggestion is to allow everything to re-set and the RAM to "bleed off". I quite often just turn the switch off and then back on again without any problems. The reason for the trashed disks is that the Amiga is multi-tasking and the disk write is just another task. Once set up, the program returns control to you (CLI prompt or Mouse re-activated) even thou it is still doing the write of the disk. Removing the disk (or doing a warm start) while the drive light is on trashes the disk since it isn't completed it's write. You get the same "trashing" on an IBM if you remove it while it's being written, it's just that the Amiga runs the equivalent of chkdsk each time you put a disk in the drive and reports the error where MS-DOS doesn't let you know you have a disk error…you have to check manually via chkdsk. Since the majority of computer failures come within the first few hours of use, I suspect you may have gotten one of the rare bad machines. Their failure rate is quite low according to our local dealer…he has had very few returns. Don
#34395From: Larry Phillips/ICUGSep 26, 1986 5:00 AM
Don, not having looked at the schematic too closely, I can't confirm or deny this, but Commodore states in their Amiga service manual that turning the machine back on too soon "may cause premature failure of the power on switch". I suppose it is possible, though I haven't seen any power supplies yet that would cause excess current or large spikes through the AC input line just by being turned on a few seconds after power off. Better safe than sorry? Regards, Larry.
#34423From: Don Curtis/SYSOPSep 26, 1986 4:59 PM
Larry, Interesting….I would have thought a spike would have taken out one of the regulators, diodes or capcitators, but not the switch itself. True, always better safe than sorry. When I say that I turn it off and then back on, that is not a quick back and forth motion, but I don't wait 5 seconds either… probably more on the order of 2. Don
#34423From: Don Curtis/SYSOPSep 26, 1986 4:59 PM
Larry, Interesting….I would have thought a spike would have taken out one of the regulators, diodes or capcitators, but not the switch itself. True, always better safe than sorry. When I say that I turn it off and then back on, that is not a quick back and forth motion, but I don't wait 5 seconds either… probably more on the order of 2. Don
#34395From: Larry Phillips/ICUGSep 26, 1986 5:00 AM
Don, not having looked at the schematic too closely, I can't confirm or deny this, but Commodore states in their Amiga service manual that turning the machine back on too soon "may cause premature failure of the power on switch". I suppose it is possible, though I haven't seen any power supplies yet that would cause excess current or large spikes through the AC input line just by being turned on a few seconds after power off. Better safe than sorry? Regards, Larry.
#34470From: Tan A. SummersSep 27, 1986 8:52 AM
Thank you for your reassurance. Right now my machine is at the repair shop, and will be "at least until Monday." I'm not familiar with standard dealer policiy regarding the Amiga. Should the dealer just give me a new machine instead of insisting I have this one repaired? Does the fact that this one failed mean it will continue to be a lemon? Of course, I should probably wait until Monday or whenever and find out what was wrong with it before deciding that. Tan
#34470From: Tan A. SummersSep 27, 1986 8:52 AM
Thank you for your reassurance. Right now my machine is at the repair shop, and will be "at least until Monday." I'm not familiar with standard dealer policiy regarding the Amiga. Should the dealer just give me a new machine instead of insisting I have this one repaired? Does the fact that this one failed mean it will continue to be a lemon? Of course, I should probably wait until Monday or whenever and find out what was wrong with it before deciding that. Tan