Chosen Solution
like ever, I turned my MBP on last night and attached it the charger but though my battery was 92%, it doesn’t start charging. Its a long time I’m seeing “Service Battery“ message but never cared that because it has only 350 cycles. now the battery is drained and can’t run MBP. I’ve done almost everything you thought (reset SMC, reset NVRAM, …) but it didn’t return. I’ve removed the battery and when trying to power on, SIL blinks three times repeatedly and nothing happen but if I hold the power button for couple of seconds and then connect the magsafe adapter, it turns on with fan at the highest speed and some limitations like no backlighting, not working DVD rom and no booting the Win OS… pls help!!!
Your Mac should start without a problem even without battery plugged in, simply by plugging in the magsafe alone, without pressing anything. What you’ve done is bypassing the SMC and since that seems the only way to start it, the “service battery” was there most probably because of a SMC related logic board failure. There isn’t much one can do on a DIY basis, board needs in depth testing and a component level repair or a replacement.
Are you using genuine apple charger or after market charger? If it is original apple charger, the machine should boot without the battery connected. The 2011 models has HDD cable failure issue but your issue don’t seem to be the cable problem. Make sure you are using original charger. The aftermarket chargers do not have enough current and cut off like the original so it is random luck.
