Skip to main content

Mid 2012 model, A1278 / 2.5 GHz i5 or 2.9 GHz i7 processor.

1624 Questions View all

MacBook Pro does not power on

Good day,

I have a Mac Book pro that i upgraded and after the upgrade, when the laptop is turned on it chimes but then stays on a white screen. Also sometimes it does not even turn on. Even though the magsafe is green and is connected and the white light to the bottom just flashes. Any idea of what can be this issue?

Answer this question I have this problem too

Is this a good question?

Score 0
2 Comments

What was the upgrade?

by

not sure. its a customer's laptop

by

Add a comment

2 Answers

Most Helpful Answer

This is usually caused by the hard drive or hard drive/IR cable. Pull the drive and hook it up to a USB to SATA adapter and see if it will boot externally. If it will see if the drive is formatted GUID. If it won’t boot try booting externally with a hard drive with a compatible system installed on it.

I always replace the cable on this model as it is a know issue.

Was this answer helpful?

Score 1
Add a comment

It could be a RAM compatibility issue. Try testing each RAM in each slot or use another set of RAM that are known to be working stable.

Was this answer helpful?

Score 0
Add a comment

Add your answer

MICHAEL JABARI NELSON will be eternally grateful.
View Statistics:

Past 24 Hours: 0

Past 7 Days: 0

Past 30 Days: 0

All Time: 52