Jump to content

Search the Community

Showing results for tags 'Power'.

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Forums

  • Important Information
    • The 68kMLA Forum Rules
  • Community Connections
    • General 68kMLA News & Stuff
    • Conquests
    • Trading Post
  • Projects & Hosted Forums
    • RetroChallenge
    • 68kMLA Wiki
  • 68k Model Forums
    • Compact Mac
    • Mac II, Quadra & Centris
    • 68k LC & Performa
    • 68k PowerBook
  • PowerPC Model Forums
    • NuBus Power Mac, LC & Performa
    • PCI Power Mac & Performa
    • G3/G4/G5 Power Mac, iMac & eMac
    • PPC PowerBook & iBook
  • Everything Else…
    • Apple I, ][, /// & Lisa
    • Newton
    • Software
    • Hacks & Development
    • Peripherals

Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Joined

  • Start

    End


Group


MSN


Website URL


ICQ


Yahoo


Jabber


Skype


FACEBOOK


GOOGLEPLUS


TWITTER


YOUTUBE


Location


Interests


OCCUPATION

Found 14 results

  1. Hey, new to the forum here. I have accumulated quite the vintage Mac collection, and as everyone has experienced, the leaky capacitor issue is a real pain. Luckily I learned how to remove and solder on new caps. I've been using tantalum caps, and I've got at least 2-3 of the IIci/IIcx motherboards where I recapped them, and they turn on just fine, but once they've warmed up, the just shut off and then power back up. However, they don't power up completely, they immediately turn off again, and on and so on. The cycle starts with the first shutdown/power up I hear the
  2. I recently bought a Performa 450 which was in very good condition, no visible leakages, blown-up batteries etc. When I power it on, I can only hear a clicking sound from the speaker. Fan is working correctly. I measured output of the PSU and so far it looks like I'm getting wrong voltage on +12V and +5V lines. It fluctuates around +8.5V and +2.8V respectively. -5V line shows correct voltage though. Do I have faulty voltage regulators or should I recap the PSU? It's one of the Dyna Comp (not TDK). Close-up photos attached.
  3. SuperMac Spectrum Power•1152 graphics card with weird red artefacts (the HD icon labels) that appear after being connected to an AppleColor High-Resolution RGB Monitor for 5–10 min. (The card works great with an Apple Studio Display.) Sound familiar?
  4. Hello, I know that there is much discussion around the Mac Portables and their woes with powering up. So much information, in fact, that I have become lost in it all and have no idea where to start. So, if I may, some simple questions, and some directional guidance required. I have several of these beasties and they all do not seem to start up. Some don't boot at all, some boot then power off, some boot, show a mouse, and the drive tries to spin up then shuts off. One I had boot and went straight to sad Mac. It even ran off the replacement battery that I had in it (6v 5maAh le
  5. I'm currently working on a Mac Portable, backlit. Its been cleaned, recapped, fresh battery installed, w/ SCSI2SD. System 7.1 installs fine, but as soon as it booted the first time after install, I get the message: "No battery reserve power remains. The Macintosh will go to sleep within 10 seconds to preserve the contents of memory. Good Night." And then it sleeps. Waking it back up just gives the same message, and it cycles again. Booting a System 6.0.8 floppy works fine, as I assume it does not monitor the battery. The battery is charging correctly, showing ~6.2v alone, and ~
  6. Hi all, Picked up a Mac Portable 5120 (non-backlit) last week; before powering it up, I removed the logic board, removed the caps from it - all of them, except the tantalum cap on the hybrid board - cleaned the board, replaced the caps, and got a new black 6v 4.5ah brick battery. Putting it all back together, it won't boot off of the battery alone - the screen flickers, and it either hangs on a flickering mouse-pointer screen, or flips over to the chimes of death. With the original Macintosh Portable power adapter and new battery connected, it will boot 90% of the time. When it fa
  7. I am unable to power up my iMac G3. I opened up the case and pressed the CUDA button and it powers up. However every time I switch the mains to off I have to redo it again. Is something faulty? I had the PRAM battery removed by the way.
  8. Since this is absolutely the place to contemplate this question, I've been thinking about how to make my Wallstreet mobile again. I had a thought: What if you took the innards out of an existing dead battery pack and installed a cheap USB power bank in the case and used it in the slot? Could you run the machine with just the power leads connected, or would it complain if it didn't see anything connected to the charging pins? Would the machine be able to tell the level of charge just from the power output? Basically, does anyone have a schematic for the charging system I can review befo
  9. Hi all, excited to be a new member. My friend and I have been debugging a recapped 5126 lately and are looking for some advice. Once again this machine was recapped some time ago The machine is in OK shape overall with a well-behaved 40MB hard drive. Unfortunately, leakage from the three caps under J13 (left-hand kb/trackpad port) took a toll on the circuit board. We've recently bridged two pins of J13 that were attached to broken traces over to their cousins on the other side of the board. Also, I just now finished wiring the interrupt switch directly to the Misc GLU to work around
  10. Dear members I just purchased a Quadra 950 and it arrived safe and sound. The seller claimed that the power supply only clicked. My 4 year old daughter turned the key while just after I pressed a power button on the front facing panel and there was a chime, a loud healthy fan and a power light. Now, I have no monitor to check and there is no HD. Is this enough to confirm the machine works or should I ideally try something further. There also appears to be a 601 PDS card and a very large card that I suspect is a video card and gobs of RAM. Any advice would be appreciated. Ma
  11. So I recently acquired a Mac Portable. As soon as it arrived I took it apart, re-capped the motherboard and hooked it up to a replacement battery. Everything was going well, actually no issue at all last night. I was able to mount some Appletalk volumes and play some games, it seemed pretty stable. This morning I decided to break open the original apple battery and toss my new cell in there. While testing this configuration, I accidentally hooked up the battery with reversed polarity... I know, this was dumb. Now I'm having issues again. Here are the symptoms: 1. Will not power on at all wi
  12. Hi. I bought a G4 Cube from the bay a while ago, and it currently has some issues maybe you guys can help me with. The Cube is pretty much a stock one, and all it does is: It powers on and shows the apple boot logo / plays the bong and even starts to load the OS. All ok up to here right? Thing is, as soon as I plug or unplug something on the (only working) USB port, it restarts. The other USB port is damaged (!!!!). If I turn it on with something already plugged in, it works, but it seems that the USB port hasn't got enough power to deal with a HUB, a keyboard and a mouse, so I
  13. I just bought a Studio Display (M4551), with no power adapter and unfortunately this kind of adapters could not be found in my area. I've seen few items on eBay, but they were too expansive and including shipping to my destination it would have been more than 3 times more than the cost of the display itself. So I was thinking of finding some alternative or using iBook power adapter which has the same output, but I can't find information on the polarity (positive/negative) of the display's power cord. Polarity isn't mentioned on the original power adapter. Does anybody have this kind of adapter
  14. Hi everyone! When I was younger the main computer in my family was a tray loading Bondi iMac running 8.6. It was used for hours each day for at least ten years (that's a conservative guess, it was very probably longer). A couple years ago it started having a minor issue. The power button needed to be pressed two or three times to get it to boot. Other than that everything was working great. One morning I got up and heard from a sad family member that the iMac wouldn't start up at all. No chime, no lights... nothing. It's currently sitting in my cold, lonely closet, and after reading
×
×
  • Create New...