Battery Can't be Detected and Trackpad settings missing
So I recently replaced the logic board in my Early 2011 MACBOOK PRO in an attempt to breath some life back into it. Previous symptoms were the screen coming out greenish with very pixelated apple logo then crash before ever reading login screen.
New logic board fixed that problem, got the computer running but a new series of issues has arisen:
1) originally the battery emblem had the grey X in it, and the power cord light is stuck green even though battery is not charged. Tried resetting NRAM/PRAM and the SMC, instead of fixing the issue the battery icon has disappear entirely. I also have tried running Coconut Battery which also does not detect the battery. Put a multimeter on the battery connection to the logic board and I am getting 3-12 volts on various pins (first thought was the DC in had gone bad).
2) Running High Sierra the settings menu Trackpad section does not detect the internal trackpad even though it is working. Instead it is stuck looking for a bluetooth magic pad. Trackpad works fine accept I can't change any settings and it does not recognize Right-Click. All other gestures work.
My question is, could this all be from a bad battery? Its like the computer thinks it is a desktop now the way the battery icon has vanished and it is looking for a magic pad. Im trying to avoid a 60-100 dollar battery unless I am sure it is the battery and not a module on the logic board, SMC, etc. Any recommendation are greatly appreciated for further testing or a definitive on what the issue is.
UPDATE: New battery has not fixed the issue. Battery is still not being detected by system settings or coconut battery. However, the logic board is drawing power as disconnecting the charger does not cause instant shutdown. System settings is still not recognizing the trackpad either.
I’ve reinstalled OS High Sierra from disk recovery to no avail. At this point I’m running out of options other than possibly a faulty logic board. I’m hesitant to call it that since the battery is providing power and the terminals on the logic board read 12v which would seem correct for a 10v battery.
Any other ideas on tests to run or hard resets are much appreciated. Only other hardware step that involes power is the MagSafe itself, which I may try to sneakily test one at a local Apple store before purchasing a new module. I’ll attempt to call iFIXIT regarding the logic board they sent me and see if they recommend trying another.
To recap: SMC and PRAM reset have not helped, reinstalling OD has not changed anything, Single User Mode fsck -fy has not repaired anything, replacing battery has only changed that the computer appears to be drawing power from the battery though not detecting it.
to be more specific, the battery icon will not appear. every time i change the setting to show battery percentage it resets the box to unchecked after a brief pause.
I've also tried reseating the RAM cards and the battery twice.