iMac won't boot after memory upgrade

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pollock


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Hello,

Recently I have upgraded my iMac with 2GB additional memory and since then my iMac won't to boot properly.
I am running the leopard latest version and I have 3 gb memory currently installed.

I have attached message appeared on the screen while system is starting.

Panic(cpu 0 caller 0x0043913F): “Unable to find driver for this platform : \”ACPI\”.\n”@/Source Cache/xnu/xnu-1228.15.4/iokit/Kernel/IOPlatformExpert.cpp:1407

Debugger called: <panic>

Backtrace (CPU 0), Frame : Return Address ( 4 potential args on stack)
0x41643dd8 : 0x12b4c6 (0x45f91c 0x41643e0c 0x13355c 0x0)
0x41643e28 : 0x43913f (0x4a6228 0x4e47710 0x41643e58 0x4eb4580)
0x41643e48 : 0x417068 (0x4eadd00 0x4eadd80 0x1 0x3f1478)
0x41643ea8 : 0x41890b (0x4eadd80 0x4eadd00 0x4eb4600 0x0)
0x41643f28: 0x41816f (0x4eadd80 0x4eb4680 0x8 0xffffffff)
0x41643f28: 0x419803 (0x4eadd80 0x0 0x1a40b5 0x4ea98b8)
Backtrace terminated-invalid frame pointer 0

BSD process name corresponding to current thread: Unknown
Mac OS version:
Note yet set

Kernel version:
Darwin Kernel Version 9.8.0: Wed Jul 15 16:55:01 PDT 2009; root :xnu-1228.15.4~1/RELEASE_I386
Click to expand...


Many thanks for your help.

Pollock
 
dtravis7

dtravis7


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Your Mac's Specs
MacMini M-1 MacOS Monterey, iMac 2010 27"Quad I7 , MBPLate2011, iPad Pro10.5", iPhoneSE
Which iMac is it and what RAM did you install? That is a Kernel Panic and looks like issues with the new RAM.
 
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pollock


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iMac 20' early 2008 version

I installed new Kingston 2gb memory module (kta-mb800/2g).

I booted successfully yesterday but today won't start up...
 
dtravis7

dtravis7


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Your Mac's Specs
MacMini M-1 MacOS Monterey, iMac 2010 27"Quad I7 , MBPLate2011, iPad Pro10.5", iPhoneSE
Is the New RAM seated all the way in the sockets?

What happens if you take out the old 1GB stick and just boot with the new 2GB stick you purchased?
 
dtravis7

dtravis7


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MacMini M-1 MacOS Monterey, iMac 2010 27"Quad I7 , MBPLate2011, iPad Pro10.5", iPhoneSE
Just a note, I have had much better luck with Matched Pairs of RAM in the new systems like your iMac. Like 2 of the 2GB sticks you purchased.
 
pigoo3

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hothacker3000


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the issue could be that the memory that you inserted in the slots may be bad

memory/ram or isn't for that perticular motherboard or imac i should say. So try

looking memory for the same memory that was on your computer before you

purchased the new ram/memory

instead of diffrent kinds of ram, and that should work ......
 

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