iMac won't boot after memory upgrade

P

pollock

Registered
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

Pollock
 
Whats the memory brand? Did you change both memory slots? Are the new memory compatible with the previous ones? Removing the new memories, does it resolve the problem?
 
I installed new Kingston 2gb memory module (kta-mb800/2g).
My old memory is Samsung M470t2864qh3

I booted successfully yesterday but today won't start up...
 
Which iMac is this? I'd go and try to reseat the RAM. If it is one of the older Intel iMacs with the white levers for popping the RAM out, those levers pop out the RAM for both chips. So its possible you thought the one chip stayed seated when you added the other one. So go ahead and try reseating until it works. If you still can't get it to work, run both chips alone and verify which ones bad. Test both slots also to make sure you didn't blow a slot when you did the RAM.
 
You must log in or register to reply here.
Back
Top