gillies@p.cs.uiuc.edu (08/19/88)
I believe the Mac II has circuitry to keep you from powering it
up/down quickly. So if your machine ran for a few hours, you
may have to wait a few moments until it cools off, before you can
power it back up.
Don Gillies, Dept. of Computer Science, University of Illinois
1304 W. Springfield, Urbana, Ill 61801
ARPA: gillies@cs.uiuc.edu UUCP: {uunet,ihnp4,harvard}!uiucdcs!gilliesnopuklic@ndsuvax.UUCP (Blayne Puklich) (08/21/88)
In article <76000276@p.cs.uiuc.edu> gillies@p.cs.uiuc.edu writes: > >I believe the Mac II has circuitry to keep you from powering it >up/down quickly. So if your machine ran for a few hours, you >may have to wait a few moments until it cools off, before you can >power it back up. > >Don Gillies, Dept. of Computer Science, University of Illinois >1304 W. Springfield, Urbana, Ill 61801 >ARPA: gillies@cs.uiuc.edu UUCP: {uunet,ihnp4,harvard}!uiucdcs!gillies No way, man! I have a II that stays on all day, and I can turn it on and off very quickly. It'll power up directly after the Shutdown Manager gets done. ||+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++|| || Blayne Puklich nopuklic@plains.NoDak.edu || || NDSU Student ACM use this-> NU087763@NDSUVM1.bitnet || || Chairperson North Dakota State University, Fargo, ND || || || || "Everyone should have a Corvette, I think." || ||-------------------------------------------------------------------------||
jcc@ut-emx.UUCP (J. Chris Cooley) (08/22/88)
In article <76000276@p.cs.uiuc.edu>, gillies@p.cs.uiuc.edu writes: > > I believe the Mac II has circuitry to keep you from powering it > up/down quickly. So if your machine ran for a few hours, you > may have to wait a few moments until it cools off, before you can > power it back up. > Actually, it has nothing to do with heat, but with letting all the silicon components "discharge" (for lack of a better word). Apparently, there can be damage if an IC which has some arbitrary voltage across it (from the power-down) gets its regular voltage from the power-up applied to it. This is nothing new. I was told of this back when my Radio Shack Model 1 was a big contender in the computer ring. I've personally seen that computers sometimes don't power up if not let to sit a few seconds after power-down. > Don Gillies, Dept. of Computer Science, University of Illinois > 1304 W. Springfield, Urbana, Ill 61801 > ARPA: gillies@cs.uiuc.edu UUCP: {uunet,ihnp4,harvard}!uiucdcs!gillies --chris Disclaimer: I'm not pretending to be anyone significantly skilled in electronics. -- J. Chris Cooley | husc6! -\ Computation. Center (COM 1) | im4u! -->-cs.utexas.edu!ut-emx!jcc Univ. of Texas at Austin | uunet! -/ Austin, TX 78712 |
espen@well.UUCP (Peter Espen) (08/27/88)
OK....My Mac II power up problem is getting stranger all the time.... When I am not using my Mac II, I turn it off, remove all the cables, and lock the Mac II in a secure storage cabinet until I return the next day. The Mac II sits in the storage cabinet with the floppy drive slot facing down. When I return the next day, I plug in all the cables, and the Mac II will not turn on at all with the Mac II sitting horizontally. If I turn the Mac II on it's side (the side opposite the reset and interrupt switches) the Mac II will power right up with the power on switch. I can then put the Mac II horizontal again ( CAREFULLY while it is booting up) and the Mac II will power up and down correctly all day long. When I return the next day and take the Mac II out of storage again, the whole story repeats itself. I know this sounds strange, but it IS what's happening, and YES, all\ power cables are OK and NOT intermittant with position etc. Can anyone even attempt to explain this??