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Hey All, I rebuilt a test pack for my 2300 and, although it is charging it will not power the machine. it shuts down immediatley when disconnecting the external A/C adapter. Are the battery types not interchangeable between Duo versions? I have two packs. One is a model #M7782 and the other...

Hey all, I just acquired a PB Duo 2300c in trade to build some battery packs for that model but all it does at power up is make a startup chime. There's no hard drive sounds and the display never lights up. Does anyone know if this is common and if there are some troubleshooting and repair...

Hi all, Can someone point me to the VRAM on this 3500 board? On the Mack of the board there are four V53C16258LT50 chips and the datasheet I found for these says they are 256K X 16 so that would mean 1MB. These are also sitting next to the vga connector and video display connector so I’m...

Anyone know know if the vias on these old boards connect to traces in the middle layers? I ask because I’ve got some badly corroded vias and traces forcing me to have to drill them out and run a wire through the board.

Anyone know if I could simply add RAM chips to the vacant sections on this 8mb RAM expansion board to make it into a 10mb? Are those 1uf decoupling/ filter caps? would I need to add those as well?

Hey all, Working on another Macintosh Portable board I got on the cheap but... Someone freakin destroyed it trying to do a cap kit. It also has/had several broken traces from leaky cap corrosion. I've fixed replaced all the melted and or broken components / lifted pads, and all the broken...

Hi, does anyone know if a Nubus card should show activity on the address/data lines if just power is applied to the card from a non working / running Mac logic board? I have a Radius Rocket card that’s not working and I was going to try to troubleshoot it but I can’t tell if Nubus cards need a...

Anyone know what the cause of this "disk full" error I keep keep getting when 32 bit addressing is enabled to access my full 32MB of ram? Its a Mac IICX and certain programs cant save to disk.. They error out with a -34 Disk Full alert. so far the problem apps i've discovered are: THINK C -...

Hey all, So I just did the 8 hour lcd panel bake to fix the tunneling issue with the PowerBook 180 and all is good EXCEPT I just noticed that one vertical row of pixels is duplicate itself two pixels over. I’m not sure if I have introduced this problem or if it already existing and I never...

I just pulled my Powerbook G3 Kanga out to assess its condition. Aside from the brittle cracked case, it is showing a few signs of life. The hard drive spins up but that’s about all. No boot. But worse is the display. Anyone know what these signs might point to as the issue? My first...

Just got an AppleColor RGB monitor that needs repair. Anyone know by looking at the screen what might be the issue. I’m assuming caps but first look and they all visibly look ok. I’ve got diagonal RGB lines and a purplish screen.

Hey all, I've posted this in tinkerdifferent as well but have only got one person to help out some so trying over here... Ive been troubleshooting my old super corroded Mac Iicx.. so far ive managed to get the power circuit working so pressing the power button fires up the power supply and the...

Any ideas what might cause a board to crash when it plays a sound? Startup sound plays fine, system boots fine, apps run etc but if you go to control panel/sound and play an alter the machine crashes. System 6.0.8. Board is a another Macintosh Portable I just re-capped and replaced hybrid power...

Hey all, So I have taken the risky plunge into making an attempt at repairing my non-backlit LCD panel on this Macintosh Portable I have been repairing and restoring. The display has the classic "dead pixel" horizontal lines... At first it only had one.. Then yesterday another one has appeared...