Recent content by Garrett B

Nice work diagnosing the RAM issues! If it were me, I'd remove the accelerator and make sure the logic board will get you to a flashing floppy disk. That way you know the majority of the logic board is in a working state.

You bring up a good point here. I've done some serial diagnostic work on a Portable but didn't even think to try the IIsi. I know it's supported - just need to figure out syntax for the right tests to run. Unfortunately a lot of this isn't super well documented. I'll post back though when I have...

When you say "video controller chip" you're talking about the RBV chip at UA3?

Checked this as well - good continuity just missing some solder mask is all.

Yup, all toned out just fine. I did just purchase an interposer SIMM from zigzagjoe. I might try it on the IIsi for giggles and see what the bus is doing upon power up.

Agreed - don't open up an otherwise working machine! Not worth the risk, and I don't think that would give us any more good information. I have verified that a working 5300c display will show a legible image with either the VGA or sVGA display cable. Maybe if you aren't willing to sell the...

I have tried both the 821-0083-02 / 632-0069-02 VGA cTFT cable and the 821-0085-02 / 632-070-02 SVGA cTFT cable. Part number on the LCD is LTM10C036, which should be correct for the 800x600 ce model. I do have a working 640x480 active matrix panel from a 5300c, and it works with both my cables...

I've been trying to source a replacement panel for my 5300ce for around 6 months now. I've tried five (no joke) panels from China, and they all display horizontal lines like I have pictured. No discernable image ever appears. The panels themselves are a little questionable looking, but I find it...

Nothing yet. I got too frustrated and had to walk away from it for a while. I should revisit it again - just need to come to terms that whatever is wrong probably won't be "easy" to diagnose!

Nice! I’ll give this a shot for making new images.

Well, here’s one way that works (as long as you have a good CD to start with). Using the copy command in Toast 5, I was able to make a bootable disc. Unfortunately I’m still unsuccessful at burning my own image or an image of a disc, but I guess that’s a problem for another time. One of these...

I did actually try that, but Disk Utility didn’t want to make an image from the device. However, if I select the volume itself, I’m able to create the image (See screenshots). Maybe I need a different version of Disk Utility?

Well, I’m stumped and have spent way too long and tossed way too many CD-Rs in attempt at this. All I want to do is get an OS9 disc bootable (shouldn’t be that hard, right)? I have a 12” PowerBook G4 I’m using as my burner device, running 10.4. For images, I’m using an OEM 9.2.1 install CD, with...

Small update: I removed the buffers on each end, and the RAM IC closest to the power supply connector. All traces and pads in good shape, no breaks. I installed a new RAM chip and reinstalled the old buffers. The board was quite clean and so were the chips - no green corrosion visible to my eye...

I think this will be my next step. If that doesn’t do it, I’ll source a new buffer and RAM chip from a different board. I haven’t ever seen the buffers fail, but I guess anything can happen. I agree it’s ugly in that area with the solder mask missing, but the resistor is in spec and making good...