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I want to understand - Macintosh Portable error code
Posted by: plb007 on 2022-05-29 03:45:49 Hi, I just bought and recap (+ultrasonic cleaning, drying) a non-backlit Macintosh Portable and get an error code when starting. I got the chime, but the a continuous beep and the sad mac's chime. Error code are : 00000003 / 0000FF00 I tried to understand what are those code but cannot decode them. I tried to find some explanations regarding data line and address line but still can't understand those informations posted here Video of booting is here :
Posted by: Johnnya101 on 2022-05-29 06:45:00 Just wondering, are you using the correct original charger that has been tested to be good AND a brand new good battery? Without those two things, you wont get very far.
Posted by: plb007 on 2022-05-29 06:51:12 Hi, I checked the original charger (I have two of them). The one I'm using is giving me 7,4V - I assume is correct. It's a replacement battery that looks in shape. Can a bad battery cause those errors code ? Thanks,
Posted by: 3lectr1cPPC on 2022-05-29 07:39:01 I'll bet this isn't the issue since portables are so problematic, but if you haven't already, try removing any RAM upgrade cards if present. It might be crashing on the RAM test.
Posted by: plb007 on 2022-05-29 07:41:03 Hi, The portable acts the same with or without the extra ram card.
Posted by: Plottem on 2023-02-07 14:41:46 Hello, I have exactly the same error on my portable, did you manage to solve it? All the best
Posted by: NightlyH on 2023-04-02 08:42:02 Same error on mine as well. Appears to be an issue with the ram's upper bits.
Posted by: Sideburn on 2023-10-01 02:05:15 Same here but mine is 00000003 000000FF
Posted by: tronlives2 on 2023-10-03 09:53:14 Same here but mine is 00000003 000000FF Same for me.
Posted by: wymtb on 2023-10-10 12:36:12 Would bet there is at least one bad trace under one of the ram chips. I fixed such an issue with bodge wires on one of my boards and as far as I remember the error code was comparable. Try to find the broken trace with a continuity tester.
Posted by: Sideburn on 2023-10-12 10:31:01 Thanks I will go through the board and see what I can find.
Posted by: plb007 on 2024-07-26 13:17:25 Would bet there is at least one bad trace under one of the ram chips. I fixed such an issue with bodge wires on one of my boards and as far as I remember the error code was comparable. Try to find the broken trace with a continuity tester. View attachment 63362 Hi, does the 8 columns (x4 rows) of memory module should be wired in parallel ? If so, I have many broken trace each occurring between the 4th and 5th column.
Posted by: SuperSVGA on 2024-07-26 17:52:32 Hi, does the 8 columns (x4 rows) of memory module should be wired in parallel ? If so, I have many broken trace each occurring between the 4th and 5th column. The upper 4 rows (B,C,D,E) are connected to data bits 0-7, while the lower 4 rows (F,G,H,J) are connected to data bits 8-15.
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