No boot sequence; One Low tone beep. Post-RAM upgrade.
MB Pro Unibody mid 2010 A1278
Installed “memory maxxer” upgrade kit. X2 8GB DDR3 PC3-8500 1066MHz 204 PIN sticks.
When power button pressed, the white indicator light in front bezel comes on, the fan spins up, but no booting or beep codes.
Removed 1 RAM and repeated with 1 chip in either slot, same results for both new chips.
Replaced original RAM and boot is fine, MacBook chuggs right along as it always has.
Removed old RAM, tried new RAM in each slot. News position yields one low tone beep and no boot. Low tone beep repeats.
Any advice would be appreciated.
Cette question est-elle utile ?