WAXMONRW@SNYBUFVA.BITNET (04/11/90)
I have minor problem; my new (5 month old) ROM 3 GS is DEAD! I do not seem to get any power through the CPU; the green light on the CPU is off and I do not get any power to the disk drives (the buttone will not eject a 3.5 in. disk). I have swapped my CPU with another and the second machine is dead with my CPU; therefore, it must be my CPU. My best guess is my power supply. Can it be removed as easilly as the power supply on the IIe? If so, I can swap power supplies and see if that is the problem. If it is, does anyone (besides Apple) sell a replacement power supply. Could it be anything other than the power supply? Is there any other test I can make? Any suggestions would be appreciated! Ray Waxmonrsky (WAXMONRW@SNYBUFVA)
cyliao@eng.umd.edu (Chun-Yao Liao) (04/12/90)
In article <AF547C93D63FC017AF@snybufva.bitnet> WAXMONRW@SNYBUFVA.BITNET writes: >My best guess is my power supply. Can it be removed as easilly as the power >supply on the IIe? If so, I can swap power supplies and see if that is the >problem. If it is, does anyone (besides Apple) sell a replacement power >supply. Could it be anything other than the power supply? Is there any >other test I can make? > >Any suggestions would be appreciated! > >Ray Waxmonrsky (WAXMONRW@SNYBUFVA) yes, the powersupply can be easily removed...uh... even easier then removing power supply from //e. My suggestion is to get yourself an AE Vulcan internal harddriver which replaces your powersupply while give you EXTRA/FAST data storage. -- cyliao@wam.umd.edu o NeXT : I put main frame power on two chips. @epsl.umd.edu o people: We put main flame power on two guys. @bagend.eng.umd.edu o :::::::::::::::::::::::::::::::::::::::::::: xxxxx@xxxxx.xxx.xxx (reserved) o RC + Apple // + Classic Music + NeXT = cyliao
gwyn@smoke.BRL.MIL (Doug Gwyn) (04/13/90)
In article <AF547C93D63FC017AF@snybufva.bitnet> WAXMONRW@SNYBUFVA.BITNET writes: >I have swapped my CPU with another and the second machine is dead with >my CPU; therefore, it must be my CPU. >My best guess is my power supply. ??! Presumably you didn't really swap just the CPU but rather the whole box. >Can it be removed as easilly as the power supply on the IIe? >If so, I can swap power supplies and see if that is the problem. Frankly, if you can't figure this out by inspection then I would caution you to let somebody more mechanically inclined work on it. Did you check the fuse?
rhood@pro-gsplus.cts.com (Robert Hood) (04/13/90)
In-Reply-To: message from WAXMONRW@SNYBUFVA.BITNET Okay, here's what I suggest you do to see if your power supply's bad: 1. Find the +5v and Common lines coming out of your power supply. Using a voltmeter, see if any current is indeed coming out of your power supply. (Note: if you have no voltmeter, a light bulb and fixture will do the job. If you really need details, just ask and I'll tell you how to put it together.) If your power supply IS sending current, there's a short somewhere and you can use the voltmeter to determine where. You may need to get a new motherboard if there is a short, but it may be something you can replace with a bit of solder to repair a break. (NEVER do something like add that bit of solder unless you're POSITIVE that's the problem and the right way to fix it, though....) If there's no power coming from your supply, AE probably sells a GS heavy-duty power supply much like the one they made for the //e. 2. If your motherboard seems to be bad, take it to Apple and have them check it out. If they come to the same conclusion you did, you've probably saved some labor charges at least. If not, well, nothing lost, right? I might as well give you the details on that "light-bulb voltmeter". Get a light bulb fixture and a light bulb; make sure both can handle 5 volts. If there are no wires attached to the fixture, solder one wire to the side of the fixture and one to the bottom (I believe those correspond to + and - but you may check with whoever you get the stuff from just in case). Strip about an inch of insulation from the end of each wire to make a probe, and you have a voltmeter ready to use. If it lights, obviously you have current. You may wish to test this with a battery, of course.... Hope that helps you out! Robert Hood - programmer ProLine address: pro-gsplus!rhood InterNet address: rhood@pro-gsplus.cts.com
throoph@jacobs.CS.ORST.EDU (Henry Throop) (04/14/90)
I was away from my gs for about a week, and now when I use it, the screen (Apple RGB) jumps up and down a few scanlines randomly every couple of seconds. This happens during text and graphics mode, and the CPU tests out fine. Is this a common problem that can be fixed easily, or do I need to take it in and donate whole lot of money to my local AppleDealer? No, it's not been dropped anything, and the cables are all secure. ROM 01, 1.25MB, 1-3.5", 1-5.25" on controller card, System Saver, Grappler+. Thanks for any help Henry --- Henry Throop Internet: throoph@jacobs.cs.orst.edu