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Found 9 results

  1. I recently bought a Macintosh Portable on eBay. When buying, I was aware of a few common issues it would have. Caps, and the fact it uses a led acid battery and won’t run without one. Purchased a lead acid battery off eBay with the correct specs when buying the portable. (6v 4.5Amp) I know a good amount of vintage Macs and have a pretty large collection but I’ve never had any prior experience to the portable. I decided I may as well give it a shot. With the new battery installed, the portable takes 5-10 minutes until it’ll power up at all. It also won’t power up with the HD plugged in. The scr
  2. A couple of months back I bought a 1MB SRAM card for my Macintosh Portable (non-backlight) from a vendor in France via eBay. Unfortunately the vendor lied that it was in full working order as it didn't work. (Thankfully I got my money refunded and he didn't want it back.) Well, something terrible had happened to the card all the chips connected directly to the address and databuses were fried, including the 74AC24x chips on the board were fried. I'm guessing that the VLSI custom chip is too. After replacing the 74AC24x chips the card partly works. It mostly doesn't pass
  3. Hello Folks ! recently acquire a Macintosh Portable M5120 non backlit , as usual washed and cleaned motherboard , recapped with new capacitors , cleaned as if there no tomorrow hybrid but on start up Portable start immediately with sad icon , distorted video and stripes (see video) the "intermittent start and stop on video at first is due to the fact that power supply was not connected and battery was low ,Portable normally start up with sad icon ( 2 distorted ) and stripes , hard drive spins but nothing else . Maybe Techknight can "unlock " the secret thank you
  4. Hi I use the case of my portable with new macbook but I want to keep the original keyboard, do anyone know how can I use the macintosh portable keyboard and change the IDE interface to USB so it works with new Laptops?
  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. I just bought a macintosh portable thats from Ebay but it is not working I want to repair it can you please tell me where to start. a step by stem what to do and what need to be change and check? I have a new 6V 4.5Amp lead batter and new 9v backup battery but still not working(no power up, no sound). So what I have do to next change what the capacitor or wash it or what ?
  7. 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
  8. Came across this card inside a 5120. Can't find much of anything online about it. Anyone know what it is?
  9. I found a Macintosh Portable 5126 south side of London from the original owner. Got it back to the states today, put in a new battery and was surprised to find it works flawless (even the clock was set powered with 9v dated 9/94). Took it apart to remove the British invasion of dust bunnies and was even more surprised to find all the original caps are installed. Inspected them and see zero signs of leaks. Now should I stick to the side of "Preventive Maintenance" and have the board recapped? Or the side of the purest and leave it "Original as designed by Apple" and "Dont fix whats not
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