MacBook Pro models with 13" displays

6147 Questions View all

Won't boot, makes a single beep

I recently dropped my Macbook Pro. It landed flat on the ground from a 2 to 3 foot drop. It appears to be fine but when I turn it on it beeps once, pauses, and then beeps once. It does this until I turn it off.

I've tried reseating the RAM and checking the harddrive connection, neither seemed to fix the problem.

Any other suggestions?


Answered! View the answer I have this problem too

Is this a good question?

Score 0
Add a comment
Spread Fixmas Cheer
Get $12 off your purchase of $50 or more with code FIXMAS12
Spread Fixmas Cheer
Get $12 off your purchase of $50 or more with code FIXMAS12

1 Answer

Chosen Solution

The power on self-test resides in the ROM of the computer. This test runs whenever the computer is turned on after being fully shut down (the power-on self-test does not run if the computer is only restarted).

If a fault is detected during the test, you will not hear a normal startup chime. Instead, the system will beep as explained below. If you experience one of these beeps, you may call your Apple Authorized Service Provider for additional troubleshooting assistance.

1 beep = no RAM installed

2 beeps = incompatible RAM types

3 beeps = no good banks

4 beeps = no good boot images in the boot ROM (and/or bad sys config block)

5 beeps = processor is not usable

In addition to the beeps, on some computers the power LED will flash a corresponding number of times plus one. The LED will repeat the sequence after approximately a 5-second pause. The tones are only played once.

Try one stick of RAM at a time in each slot.

Was this answer helpful?

Score 5
Add a comment

Add your answer

Brian Crecente will be eternally grateful.
View Statistics:

Past 24 Hours: 3

Past 7 Days: 28

Past 30 Days: 127

All Time: 9,203