![]() It ran fine for 10 minutes off of the battery, despite showing the "" icon in the top right (it tells me there's no battery available, but I'm running off of it). Something else I noticed tonight, though, which is very strange, is the fact that the laptop WILL run off of battery perfectly fine! I accidentally pulled the charger out while booted into OSX, and the laptop stayed on.so I left it unplugged. I have tried everything you mentioned with no success. It looks factory-done.Įdit: I can't get it to let me post a comment to your answer, so I'll just edit here. What is this connector for? There's nothing to plug into it in the case, and I've never seen one before. It looks just like the bluetooth board connector (and is in fact located right next to it, near the fan) on the logic board, but it's twice as long (same width and pin layout and everything). I searched on eBay and Google for a picture of one like mine, but could not find any. This logic board, for some reason, has a connector on the board that I've never seen. I don't have a schematic for this board (820-2567-A) so I can't tell where the battery/charging circuit is. If not, what should I check? There's no water damage and no other damage. ![]() Is there some fuse that controls battery recognition/charging that could be blown? Similar to the way the backlight fuse can blow, etc. I have tested the RAM and RAM slots, both are fine I have re-installed OSX, both Snow Leopard and Lion I have tried the "power button down for 10 seconds" and the "power button down for 5 seconds, plug in charger, wait 5 seconds" methods, each to no avail I have reset the PRAM (cmd,opt,p,r) and SMC (shift, ctrl, opt, pwr) multiple times I have tried multiple, known-good magsafe boards ![]() I have tried multiple, known-good chargers (both 60W and 85W varieties) I have tried multiple, known-good batteries I think I was able to get it to say "not charging" a few times (I think this was immediately following the slew of SMC resets), but I can't get it to repeat that now Computer displays "there are no available batteries" in top right of screen with where the battery should be when booted into OSX ![]() Charger will turn orange for approximately 3 seconds when you first power on, but then resets to green Problem: The main problem with this computer is that the battery is not detected and therefore it does not charge. I'm working on one now that has me stumped by a couple of things. You can actually disable the battery health management feature on those, but it’s mandatory on M1 Macs.I repair MacBooks as a hobby, and have worked on quite a few A1342 models. You are not using the full charge capability of your battery, so what’s probably happening is that battery health management is cutting off the maximum charge at 96%.ĬoconutBattery has no way of knowing if your maximum charge capacity is at 96% because it’s being artificially limited by health management or because your battery has actually degraded.īy the way, the article you linked is the one for Intel Macs. This happens as needed to ensure that your battery charges to a level that's optimized for your usage-reducing wear on the battery, and slowing its chemical aging.” “Based on the measurements that it collects, battery health management may reduce your battery's maximum charge when in this mode. The feature does this by monitoring your battery's temperature history and its charging patterns.” “The battery health management feature in macOS 10.15.5 is designed to improve your battery's lifespan by reducing the rate at which it chemically ages.
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