Rep: 45
2
As title states, once iMac is plugged and turned on the fans turn on and makes "beeps". The screen is black and doesn't seem to turn on. No further testing has been done. I'm new to repairing Mac's in general, any help would be appreciated greatly!
Here are some photos:
Ist dies eine gute Frage?
Rep: 65
4
Hi, @acharlesalmanza
Could you tell me how many beeps you are hearing during the power up sequence?
In addition, did something specific happen before this issue first started? Or did it just seem random?
From Apple.com:
The beeps indicate that your iMac is failing the Power-On Self-Test (POST)
This test checks the Mac’s hardware and RAM (random access memory). It resides in the Mac’s ROM (read-only memory) and runs at startup (though only from a currently shut-down Mac; it won’t run if you simply restart a running Mac). If POST detects a problem, the startup sequence will probably halt almost instantly. In addition, you’ll hear one of the following sounds:
- One beep. Indicates that no RAM is installed or detected.
- Two beeps. Indicates that an incompatible RAM type is installed.
- Three beeps. Indicates that no RAM banks passed memory testing.
- Four beeps. Indicates there’s a bad checksum for the remainder of the Boot ROM. (Checksum refers to a method of determining whether data is corrupt.)
- Five beeps. This means there’s a bad checksum for the ROM boot block.
This information would help further diagnose the issue.
War diese Antwort hilfreich?
Hello,
I only heard one beep of an interval of every five seconds. I'm starting to believe it's not detecting any RAM. I checked the area where the RAM is located and it looks to me that the access door is loosely "bulging out". I hope this helps
Have you visually inspected the RAM slots to make sure they are installed properly? One beep would either indicate that there is no RAM installed, or it is not being detected (maybe a faulty connection).
Would you be able to add photos to your original listing? Supply photos of the RAM slots as well as the access door that is "bulging out". Try to make them as clear as possible.
Here is a link on how you can do that: Bilder zu einer vorhandenen Frage hinzufügen
However, if you're sure RAM is installed properly, you can try resetting the SMC, and NVRAM on your Mac. Use the links below for instructions.
Reset SMC: https://support.apple.com/en-us/HT201295
Reset NVRAM: https://support.apple.com/en-us/HT204063
If none of the previous steps work, it could be a faulty RAM stick. If there are 2 installed, try each one separately to check if one is bad.
Hey,
Photos uploaded as requested
Were you able to try out any of the other steps I suggested? Try running a single RAM stick as 1 is enough for the iMac to boot.
Is this new RAM that you purchased for the machine, and if so has it worked previously?
Yes, I tried to resest the SMC and NVRAM with no luck.
However, after trying one stick of RAM, it booted! Thank you, I never would have thought to do that. This RAM came with this iMac when I received it. Now, the iMac boots now with a black screen. Any Ideas?
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1 Kommentar
how many beeps?
von mayer