Why is the RAM not recognized?
I just installed upgraded RAM in a family member's MacBook. At the same time, I installed a new SSD and was starting up with an install DVD from the optical drive. I received the 3 tones repeatedly.
Tried reseating the modules, checking to make sure that I had the correct modules, reinstalled the old modules and have the same 3 tone result. Weird! I tried the individual slots, one module at a time with the same result.
There was some controversy on the iFixit procedure about wether to disconnect or not disconnect the battery before working on the Macbook. I opted to disconnect the battery and that seems to work fine, so am thinking that is unrelated.
I also tried resetting the SMC and PRAM with the same results.
Any thoughts on this???