Intermittent powering on, not properly detecting batteries
crwdns2934249:0crwdne2934249:0:
Hi, I own this MacBook A1278, the 2.4 GHz variant. The logic board number is 820-2327-A
Now to the problem. It won’t detect any batteries. The level indicator doesn’t show anything. Charger connector turns amber after plugging in the battery. Also, when testing with ASD EFI, the battery passes every test except temperature reading, which is too high, over the limit. ASD OS can’t even read that sensor. In system profiler, the battery doesn’t show up at all.
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In ASD OS the log reads following:
[01/01/01 00:40:06] Temp (TB3T) - Battery temperature (test #1) - Sensor Reads Within Operating Range - Check to ensure that sensor reads within operating range. [00:40:06] ERROR -- 1 [Unable to read sensor] -- (-1.00) TEST FAILED
Another problem with this machine is, that when I push the power button, the screen powers on, as does the hard drive, but nothing happens. After maybe 10-15, depending on the environment, the mac gets warm, and then powers on just fine. When I reboot it, or just briefly unplug the power cable, it turns on straight away. When I let it cool down a bit, it take some time again for the mac to heat up and turn on. When I tried powering the mac on with SMC bypass, the fan ramped up to max RPM as it should, but it never turned on.
PPBUS_G3H reads 12.35V instead of 12.6V, even when the machine is on. I also didn’t find any shorts on this line.