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Found 10 results

  1. Hi folks, this is my first post here and I’m looking for some help diagnosing yet another video issue with a Mac SE/30 - hoping that someone could point me in the right direction. Usual story, dug the Mac out of storage to find it didn’t boot, display full of stripes and noise. Removed the caps, cleaned out the electrolyte, dirt and oxide, replaced caps. The board looks great, no visible broken traces and squeaky clean. Connected to power, the Mac chimes, POSTs and boots all the way to the Finder normally, the mouse and floppy work. The issue is only the left quarter of the screen is being drawn, as if divided into four columns, leaving horizontal strips across the rest. In the Finder I can make out the trash and menubar but being continually overwritten in the same quarter screen. It’s as if only 25% the VRAM is being written, but the whole memory is being read back out to the video circuit. With the RAM and ROM SIMMs out the Mac shows a stable full screen stripe pattern. Swapping out both RAM/ROM with a known good set yields the same results. I’d appreciate it if anyone could offer any advice on what could be happening. Before I buzz out the entire board or start replacing chips I’d like an idea of what’s going on.
  2. I've got a couple of Supermac spectrum/8 series 3 cards to fit into IIci. From my searches it appeared that this card provides QD acceleration, but it turns out to be almost twice as slow as builtin video on IIci. So much for acceleration, but at least it could give 1024x768 resolution. It turned out the video is blurred the same way on both cards connected to LCD monitor at all resolutions and all color settings, even in b/w. Tested on different monitors as well. It appears that timing of color components is shifted a bit so white area gets green fringe on one border and red on the opposite. When the same monitor is connected with the same cable to builtin video port there is no such trouble, the pixels are sharp: see attached photos for comparison Any thought on why that is happening and any possible fixes?
  3. I am borrowing an iMac G3 with Mac OS 9.1 and Quicktime Player Version 5.0.2 for a film. I need the computer to play a video file that I created in the film. When I burn a CD with the video file on it, the G3 will show the JPEG image files on the CD, but the video files don't show up at all! I've tried several different formats/codecs like MOV, MP4, h264, and AVI, but none of them show up at all. I've also tried several other unsuccessful methods of transferring the video file to the G3. I can't get a flash drive to mount even when formatting it to several different formats, I can't figure out how to connect the G3 to the internet to email/download the file, and I can't figure out how to transfer the file directly via a ethernet cable connected to my modern iMac. Help? Thanks, Adam
  4. It took me a while but I finally got my SE & SE/30 Analog Board recapping video published to YouTube today. Safari users, note that you'll need Chrome or FireFox to watch it in 4K. Don't forget to watch it on YouTube so you can check out the links I put in the text description (click SHOW MORE to see all of it), including the Mouser Cart that includes all the capacitors you will need. Enjoy.
  5. MacAttack

    Macintosh 128k Video Problem

    Hello, I recently bought a 128k Mac (non-functioning) and the seller told me that he thought that the 74F253 Ram Multiplexers were bad. But after replacing them with new Motorola ones, the screen still has the same issue. Here is a photo: I have no idea where to got from this point and a google search came up inconclusive. Please Help!!
  6. Want to watch movies in 720p on your higher end G4 without maxing the CPU? Good, there is a way! All of this is referenced on a 20” iMac G4 1.25ghz w/ 2GB RAM running OS X 10.5.8. CPU usage for the playback runs right around 50% utilization. Based on that, playback is using up ~625mhz of the CPU. The remaining system is using 10% CPU, so ~125mhz. With all that said, I’d say this probably won’t work smoothly for single CPU systems clocked below 750mhz. I’m not sure if it can split into multiple threads, so a safe bet for dual CPU systems is probably at least 625mhz clock. At any rate, the instructions... Download MPlayer OSX PPC 1.0 rc1 With the playback controller selected, go to MPlayer OSX -> Preferences Select Video & Audio tab check Drop frames on slower machines set video out module to CoreVideo(BETA) Select Miscellaneous tab check Enable AltiVec check Use Cache (I set the slider to 8 ) Click OK, quit MPlayer completely. Reopen and load a 720p divx video file. Video plays smoothly in window and full screen. I have tested this on a divx version of Sunshine (2007), and there is no stutter, dropped frames, or video - soundtrack separation throughout the entire movie. MPlayer_OSX_PPC.zip
  7. Private19872

    Mac Color Classic - No Video

    Hi everyone, I'm new to the forums, but I was wondering if anyone could me troubleshoot my Mac Color Classic (stock, no upgrades like Mystic or Takky). I opened the computer and replaced the original 80MB HDD with a 2.1GB disk. Before, the screen worked and it showed the blinking disk icon, but now even though the computer turns on and makes the startup chime, the screen is entirely dark. I wouldn't be surprised if this was a cable I knocked loose or forgot to reconnect when I was removing the analogue board, but so far, I haven't been able to find anything out of place. Here's what I know: The screen still builds up a charge on the outside, which leads me to believe that the issue lies with the electron gun towards the back. The computer sounds like it's booting fine, and I think I can hear the HDD being accessed. I couldn't find any unconnected cables after checking three times. All the wires leading to the video board appear to still be firmly attached to the analogue board. The metal shielding covering the edge connector in the front corner of the analogue board is missing, though the computer appears to have worked fine without it. There's electrical continuity with the ground wire from the video board all the way to the ground pin on the cord. I was about to try removing the video board from the CRT to have a look, but I figured I'd ask here first before I make any more problems for myself. Thanks in advance for any suggestions.
  8. SO I have a new project IIc. When I power it up I get no disk drive spin, just power and vertical color bars. After disassembling it I found an anomaly at the location of the character ROM socket. The socket is a 28-pin. The chip in it is 24-pin, labeled 342-0265-A, and if i move it around slightly it get variations in the video output. I believe this chip may be a video ROM chip for a IIe enhancement kit? (No real knowledge here, just a google search). Is this the correct chip for the IIc? Any help would be great. Thx
  9. Where can I find this tool? Video adjustment tool (part number 949-0386) http://www.retrocomputing.net/info/siti/apple_repair/www.whoopis.com/computer_repair/Quick_References/Tools_Library.pdf BW, Kristian
  10. ktkm

    Invert video app Mac Plus

    I’m looking for a inverted video feature for a Mac Plus.
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