Powerbook PRAM battery upgrade

I'd say this should be ok! Sure, 8$ shipped isn't exactly as cheap as a common CR2032 battery, but after all this one is Li ion. 

Sweet!  And I love the fact that it is 200mAh.  And it also has solder tabs.  MIght be a tad short, but if you have your original, it is a non issue.

 Great detective work. Thanks so much!

jack

If you dont have an original battery for you Powerbook, can you still get hold of the connector? I could do with a backup battery for my Pismo

You can buy the PREM battery assembly - and then just update the battery if you like.  Something like this:

http://www.powerbookmedic.com/Apple-Powerbook-Battery---G4-Aluminum-15-PRAM-p-16754.html

jack

Hey this card Works! 

It didn't at first, but that turned out to be a driver issue. Even though I have 9.2.2 installed it was still running the 2.4 Nvidia drivers. I updated it to 3.5.2 and it fired right up using the DVI connection.

HOWEVER! Here is where it gets weird.

I connected my second DVI monitor to the ADC port using the Formac ADC to DVI adapter and for no apparent reason the G4 wont even turn on, no lights nothing. I had to disconnect the ADC adapter and leave the G4 unplugged for 5 minutes and then reconnect power (without the ADC connection) to get it to turn on.

What the heck is that all about?

So it looks like a common problem where the G4 will not power on when using the ADC connection unless you are using an ADC monitor, I can plug the ADC to DVI adapter into the mac while it is running and it turns off. Seems to be looking for a voltage.

I am reading through the following blog covering the topic, hopefully there is an answer in thee somewhere. http://hints.macworld.com/article.php?story=2005040811124189

This doesn't look like the PRAM battery for the G3 PowerBook

I tried taking the battery out and also hitting the PMU button, no luck. I am positive that when any ADC connector is attached to a Geforce 4 MX card when installed if the certain mac G4's, the mac is told to stop and wait for a return signal from the ADC monitor. In absence of that signal it just sits there like an old lump of coal. I tested this with a couple of older ADC Geforce cards I have and the problem did not manifest itself. Since I can make the problem happen on demand by simply plugging in an ADC to DVI adapter by its self with no DVI cable attached, that tells me that the adapter shorts across a couple of pins telling the video card to look for a voltage on another pin. I am going to attack the adapter with my ohm meter to see if indeed there are a couple of shorted pins, or if a pin shorts to ground that should not otherwise being doing so.

I imagine you guys already know this, but now I do also. 

Could the solution be as simple as this for the ADC problem  http://themacelite.wikidot.com/pins-3-and-11

It says in the diagram that pins 3 and 11 relate to the power state. Their reasoning is that some of the later AGP cards will cause the no post condition if you dont interrupt those two pins, so I am thinking the same reasoning applies in my case. Even though my G4 will post if there is no ADC connection, it stands to reason that it uses the same bus to communicate a 24V / no 24V state when an ADC connection is made, even if it is just an adapter. So I am going to try this scotch trick and report back in a few days.  At the moment I am using the DVI output from the Geforce4 MX32 card  for one of my monitors and the DVI output from the ATI 7000 PCI card for my second monitor.

Pin                 Signal name              Pin              Signal name

1                   25 V Supply              16           TMDS Data1/3 Shield

2                   25 V Supply              17           TMDS Data3–

3                       LED                     18           TMDS Data3+

4                  TMDS Data0–             19            DDC CLock

5                  TMDS Data0+             20            Clock Return

6             TMDS Data0/5 Shield        21            USB Data+

7                  TMDS Data5–             22            USB Data–

8                  TMDS Data5+             23            USB Return

9                    DDC Data                 24           TMDS Data2–

10                    Vsync                    25           TMDS Data2+

11                 25 V Return               26       TMDS Data2/4 Shield

12                 25 V Return               27           TMDS Data4–

13                 Soft Power                28           TMDS Data4+

14                TMDS Data1–              29                  Clock+

15                TMDS Data1+              30                  Clock–


ADC Pinout 10 x 3



VS DVI 8x 3



I am thinking about modding DVI to DVI cables to make a ADC to DVI (rebuilding every pin of it) because on the ADC  the 1/2, 11/12 and 21/22 pins are optionals.  1/2 are +25, 11/12 are "return" of the 25 volts and 21/22 is the "extra" usb for ADC monitors.

Maybe those Apple engineers were thinking on when ADC monitors and cables would be scarce, after all. I were thinking before browsing the schemes that we would need to use 2 DVI cables to make the ADC pinout, but are not esential.