I have no display and the system is beeping on beep every 5 sec
I upgrade my MacBook Pro 7,1 to 8GB (from the original 2GB).
Afterwards I upgraded the OS to El Capitan (ver 10.11.6). Everything was fine and I was very happy until the other day when I was FaceTiming and my system went whacky.
Screen froze with a bunch of horizontal Lines, and started beeping (one tone at 5sec intervals). I shut it down, and restarted. Now I have no display and the beeping still there.
Tried removing and reinstalling the memory sticks. Still no display and beeping. Eventually had to remove one 4GB stick and leave the other in.
I had to do Shift/Option/Command while pushing the power button thing.
It seems to be running good but only on 4GB. Would be nice if I could use the other 4GB stick too.
Please don’t suggest the EFI Boot ROM thing, as I have tried that and I get the “…won’t support…” message. Currently at EFI Boot ROM ver. MB71.003F.B0O, SMC ver. 1.60f6.
Any other suggestion for this non techie user would be welcome.