Recent content by Shaddam IV

I‘m told that the inverter board outputs a high frequency alternating current, which I can‘t measure with a regular volt meter. I‘d need an oscilloscope that I don‘t have. Is that really so?

Does anyone know what voltage and frequency (and power consumption) the original CCFL of a 180 display requires? I'm trying to find a replacement CCFL, but for that I'd need to know the volts (and possibly a/c frequency) als well as the amperes that would be required. Thanks!

the 520s were passive matrix (520: greyscale, 520c: color); the 540s active matrix (540: greyscale, 540c: color). I'm looking to replace the CCFL of an 180 (active matrix), but I'd need to find out the voltage (I think this is a couple hundred V) and power consumption. Haven't done that yet...

I had understood that the active matrix color screens actually don't have a capacitor issue (only the passive matrix screens do).

I had a very similar issue on a Powerbook 165 (passive matrix screen). I tried resetting the cable and several interconnect boards. In the end the only thing that helped was a new motherboard. Good luck hunting!

you might want o reset the screen cable (from the interconnect board to the screen). If this doesn't help, it might be the interconnect board... or even the motherboard.

Correction and update: In TCP, I'm NOT using the "Manual" setting but the "Server" one (middle radio button). While I do need to enter the Gateway, I do NOT need to enter the IP. The panel will show the assigned IP once you've connected to Theoldnet Modem's PPP server using the MacPPP control panel.

Great idea, thanks!

I've just connected to the Macintosh Garden with an ancient browser from my Powerbook 180 using Theoldnet Modem. I'm using Zterm 1.0.1 (from the Garden) to talk to the modem. I'm using MacTCP 2.0.6 and MacPPP 2.1.1 (from the Garden). I'm using Netscape Navigator 2.01. TCP and PPP are set...

I just measured one of the grey bottom screws from a Powerbook 145 I have here. It looks like 6 mm to me. See image. I think you're good with T8 6 mm. Good luck!

All 4 screws that serve to connect the bottom case to the top case are the same. There is a fifth screw at the back of the machine, near the modem port, which is smaller - do you have that screw?

Where in the case is your remaining screw located? I believe they're all the same (unlike on a Powerbook 180 which has a different screen, where the screws that hold the screen in place are shorter that on a PB 140/145/160; not sure about the PB 170 but I guess it's like the 180). The screws...

I put a 180's screen with moderate tunnel vision in the oven at 98°C for 12 hours. The tunnel vision effect is much slower to appear now, but appear it does (after 30 minutes or so). My conclusion is that the liquid crystals themselves are degraded, and that short of cracking open the panel...

Thanks! That makes it very clear.

Help please: What is a "via"?