Hi all, hopefully someone here can help me out, I've got a mid 2010 MBP with some GPU and battery issues and I'm trying to figure out what to try/replace next. Here's the mac: mid 2010 15" with 2.8 i7 running 10.6.8 snow leo 8gb ram (memtest ran, confirmed no issues with either stick as well) 500gb HDD 1680x1050 screen 330gt 512mb version GPU with intel hd GPU switching My problems: (as best I can explain...) #1 the battery Firstly, the battery. No matter what, my battery is throwing up the condition: "Replace Now" status to the system and will not charge at all. Looking at the system info I get this: Battery Information: Model Information: Serial Number: W0018PU18BWZA Manufacturer: SMP Device name: bq20z451 Pack Lot Code: 0000 PCB Lot Code: 0000 Firmware Version: 0201 Hardware Revision: 000a Cell Revision: 0158 Charge Information: Charge remaining (mAh): 0 Fully charged: No Charging: No Full charge capacity (mAh): 0 Health Information: Cycle count: 242 Condition: Replace Now Battery Installed: Yes Amperage (mA): 0 Voltage (mV): 9464 System Power Settings: AC Power: System Sleep Timer (Minutes): 10 Disk Sleep Timer (Minutes): 10 Display Sleep Timer (Minutes): 10 Wake On AC Change: No Wake On Clamshell Open: Yes Wake On LAN: Yes Current Power Source: Yes Display Sleep Uses Dim: Yes GPUSwitch: 2 Battery Power: System Sleep Timer (Minutes): 10 Disk Sleep Timer (Minutes): 10 Display Sleep Timer (Minutes): 2 Wake On AC Change: No Wake On Clamshell Open: Yes Display Sleep Uses Dim: Yes GPUSwitch: 2 Reduce Brightness: Yes Hardware Configuration: UPS Installed: No AC Charger Information: Connected: Yes ID: 0x0100 Wattage (W): 85 Revision: 0x0000 Family: 0x0085 Serial Number: 0x00731944 Charging: No ^You can see, the battery is being read as having on 242 cycles on it, but doesn't seem charge under any circumstances. I read somewhere that an indicator light would change color on the MBP when the battery was charging? Maybe on my magsafe? (forgive my stupidity - longtime UNIX, macpro, and hackintosh guy here - first time MBP owner :!: ) As of now I only have the magsafe connector lighting up a solid green. I picked up a new DC/magsafe in board/connector from a friend earlier today and replaced this port on the side of the MBP. Unfortunately no change and I still just get the solid green light - so I think this is working correctly as is my 85w power adapter. I've tried SMC reset as well but I'm not even sure if it worked. Again, I read somewhere that the light on my magsafe should've turned red but Control+option+shift+power didn't seem to do anything for me. Any thoughts/suggestions on these battery issues? #2 The GPU Also, a totally separate problem, my MBP seems to crash whenever switching from the intel GPU to the Nvidia graphics. Everything basic presents no problem, web browsing, word, simple desktop tasks. But running anything GPU intensive seems to crash my system, although I can't tell if it's actually becoming totally unresponsive or not. Once the Nvidia GPU should be running, I just end up with a black screen... Gut instinct tells me this means bad GPU, bad driver, chip overheating and unsoldering from the main logic board, or vram failure. I'm just not sure where to start or what the next step should be for further troubleshooting to find the cause of the problem. I think SMC reset could also be useful for this but again, I don't know if SMC reset is working correctly or not. Part of me wants to just update to mountain lion and see if there is a driver fix but that seems like a long-shot solution. Also my 10.6.8 is fully updated as is. I have also already cleaned the system of dust and went through everything, redoing the thermal compound and pads. The compound itself I cleaned up with AS Thermal remover/purifier. I also replaced that cheap/badly applied stock compound with Tuniq tx4, before reattaching and evenly tightening the heatsinks. In any case, I think I can now rule out the overheating as well. Any thoughts here, what do you think I should try next with the GPU issue?