mccalla@mcnc.org (Bill McCalla) (01/10/91)
Sorry if this has been covered before, but I don't recall the answer; A 3 year old Mac Plus a friend owns has the monitor blacking out occasionally. Everything else works and the monitor can usually be brought back to life with some whacks on the case, at least enough to see where to shutdown. This occurs immediately after startup and when the computer is warm. No fan and recent upgrade to 2.5 mb. Any help is appreciated. Thanx in advance. -- email mccalla@mcnc.org <mccalla> Home MCNC 7379 Sandy Creek Dr. (919)248-1993 3021 Cornwallis Rd. Raleigh, N.C. 27615 (919)248-1980 Research Triangle Park, N. C. 27709 (919) 847-2192
news@hub.ucsb.edu (news) (01/13/91)
I read the mail. The problem is gone after the check. I just tightened some connections and the monitor was clear up to now. Ny suggestion is beware of the static of your body while reseating everything. A wrist ring may help to discharge the static on man's body. Or you just avoid to touch the circuit directly by holdingh the board only. Happy reseating! hflai@squid.ucsb.edu ~. From: hflai@squid.ucsb.edu (Hsun-Feng Lai) Path: squid.ucsb.edu!hflai
sethcohn@alchemy.tcnet.ithaca.ny.us (seth cohn) (01/14/91)
mccalla@mcnc.org (Bill McCalla) writes: > A 3 year old Mac Plus a friend owns has the monitor > blacking out occasionally. Everything else works > and the monitor can usually be brought back to life > with some whacks on the case, at least enough to > see where to shutdown. This occurs immediately after > startup and when the computer is warm. No fan > and recent upgrade to 2.5 mb. > Thanx in advance. That's the power supply on the way out.. fix 1 - resolder the following connections: (this is at your own risk - I accept no responsiblity and this is NOT recommended by any one..... nuff said) series of connection where cable from logic board connects (don't forget the one slightly removed from the others) the flyback solder joints the high voltage joints - these arethe biggies (on old power supply with the paper cover held on by sticky pads these overheat and solder joints fail) again I don't recommend this to any one (ONLY authorized Apple tech should go into the machine - THere are dangerous voltages in there!!!) FIX 2 - RECOMMENDED - Take the mac to your friendly mac dealer and have them check the solder joints Seth Cohn - Ithaca NY - POB 671 - (607)273-2815 (eves) Mac Service Tech to The Stars and most major Planets The Highest Form Of Service Is Anarchy In The Defense Of The Self
wirehead@oxy.edu (David J. Harr) (01/15/91)
Speaking of monitor problems, I have a friend with an SE. The other night, he turned on hos mac and it began making loud hissing noises. It scared the bejeezus out of him, so he turned it off and took it apart to see if he could tell what the problem was. He soon found out...his monitor was cracked at the back end near the juncture of the tube and the dry solder welds. Sooo does anyone know of a rather inexpensive source for the tubes Apple uses for the Plus/SE/Classic? I don't suppose it would be that difficult to find a tech to do the work if we could find the tube... The preceding has been another fine product from the fevered brain of wirehead@oxy.edu "When you need the looniest opinions around, and you care enough to send only the very best, use wirehead..."fnordfnordfnordfnordfnordfnordfnordfnord
omh@cs.brown.edu (Owen M. Hartnett) (01/16/91)
In article <136029@tiger.oxy.edu> wirehead@oxy.edu (David J. Harr) writes: >Speaking of monitor problems, I have a friend with an SE. The other night, >he turned on hos mac and it began making loud hissing noises. It scared the >bejeezus out of him, so he turned it off and took it apart to see if he >could tell what the problem was. He soon found out...his monitor was cracked >at the back end near the juncture of the tube and the dry solder welds. Sooo >does anyone know of a rather inexpensive source for the tubes Apple uses for >the Plus/SE/Classic? I don't suppose it would be that difficult to find a >tech to do the work if we could find the tube... Larry Pina's book gives: Computer Service Experts 3484 The Alameda Santa Clara, CA 95050 (408) 984-5091 As a source for amber, green and OEM Crts. -Owen Owen Hartnett omh@cs.brown.edu.CSNET Brown University Computer Science omh@cs.brown.edu uunet!brunix!omh "Don't wait up for me tonight because I won't be home for a month."