rpb@macs.UUCP (Bob Breum) (08/11/90)
I came home the other day, and discovered my poor 3b1 going, "Click, click, click..." The caps lock and nums lock lights were flashing in unison, and that was it. No display, no disk activity (floppy or HD), just a steady clicking and the smell of toasted insulation. I took it apart, but there is nothing obvious to my untrained eye. Obviously, the powerline fuse integrated into the powercord receptacle is intact. Any help would be appreciated!
adams@swbatl.sbc.com (Tom Adams - 235-7459) (08/12/90)
In article <21187692@macs.UUCP> rpb@macs.UUCP (Bob Breum) writes: >I came home the other day, and discovered my poor 3b1 going, "Click, click, >click..." The caps lock and nums lock lights were flashing in unison, and that >was it. No display, no disk activity (floppy or HD), just a steady clicking >and the smell of toasted insulation. Something similar happened to my 3b1 after a rather severe mechanical shock. It turned out that the hard disk had gotten thoroughly wedged and was oveloading the power supply. The power supply was shutting itself off and on again at about 1 cycle per second. Replacing the drive fixed the problem. I would imagine that a short could produce similar results. -- uunet!swbatl!adams or adams@swbatl.sbc.com Tom Adams: 314-235-7459: Southwestern Bell Telephone Advanced Technology Lab BOOKS WANTED: pre-1930 radio, electrical & scientific topics
lenny@icus.ICUS.COM (Lenny Tropiano) (08/12/90)
In article <21187692@macs.UUCP> rpb@macs.UUCP (Bob Breum) writes: |> |>I came home the other day, and discovered my poor 3b1 going, "Click, click, |>click..." The caps lock and nums lock lights were flashing in unison, and |>that was it. No display, no disk activity (floppy or HD), just a steady |>clicking and the smell of toasted insulation. |> |>I took it apart, but there is nothing obvious to my untrained eye. Obviously, |>the powerline fuse integrated into the powercord receptacle is intact. Any |>help would be appreciated! Sounds like a dead power supply to me. The power was kicking in and out. Don't let the 3B1 do this too long, it could damage other components, as well. Get yourself a new power supply, it's possible that you can still get one from Mike Levin (levin@Hotline.COM) for ~$45 or so. Replace it, and all should be OK. Good luck. -- | Lenny Tropiano ICUS Software Systems lenny@icus.ICUS.COM | | {ames,pacbell,decuac,sbcs,hombre,rayssd}!icus!lenny attmail!icus!lenny | +------ ICUS Software Systems -- PO Box 1; Islip Terrace, NY 11752 ------+
tjt@cuuxb.ATT.COM (~XT6561340~Tom J. Toeller~C29~M19~6092~) (08/14/90)
In article <21187692@macs.UUCP>, rpb@macs.UUCP (Bob Breum) writes: > > I came home the other day, and discovered my poor 3b1 going, "Click, click, > click..." The caps lock and nums lock lights were flashing in unison, and that > was it. No display, no disk activity (floppy or HD), just a steady clicking > and the smell of toasted insulation. > This sounds like the power supply is switching off due to thermal overload. To tell for sure, shut the beast off for an hour or so, and try it again. If you get the same results right away, either the power supply is bad, or something is overloading it (try disconnecting the hard drive power cable). If the machine runs, check the following. In the one fan units, it is quite easy for the fan to be slowed or completely blocked by the wires connecting the power supply to the rear of the case. Make sure that the fan spins. If it doesn't, pull the top off and set it down behind the base with the screen facing up and the power recepticle hanging over the edge of the table. This will allow you to run the unit with the top off. Power up the unit and see if the fan runs. If it does, replace the top making sure that the wiring doesn't interfere. If it doesn't, either the power supply, or the fan, are defective (check the voltage going to the fan).