2011 imac not booting after os x yosemite installed...just beeps with black screen

installed Yosemite and now my iMac will not start
no problems before...
signed in today after iMac booted...
then went to black screen and beeps
cannot get past...beeps with black screen

Hey FloydC,
Thanks for the question. I understand you are experiencing issues with your iMac. The following resource may help to resolve your issues:
Troubleshooting: My computer won't turn on
http://support.apple.com/kb/TS1367?viewlocale=en_US
Mac computers: About startup tones
http://support.apple.com/kb/HT5860
Mac OS X: Gray screen appears during startup
http://support.apple.com/kb/ts2570
Thanks,
Matt M.

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Hi Arkku , and a warm welcome to the forums!
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If that should fail...
applesetupdone...
This was Posted by: JoseAranda at September 9, 2006 3:48 AM
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end of posted by: JoseAranda"
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Please click the "Kudos, Thumbs Up" at the bottom of this post if you want to say "Thanks" for helping!
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The Great Deku Tree
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Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x000000003900FF1C PC=0x00000000008FC020
Latest crash info for cpu 0:
Exception state (sv=0x4299D280)
PC=0x008FC020; MSR=0x00009030; DAR=0x3900FF1C; DSISR=0x40000000; LR=0x008FE348; R1=0x2C47B9F0; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x008FE348 0x008E0014 0x002E9A80 0x002EB94C 0x0008C248 0x00029234
0x000233F8 0x000ABEAC 0xFF9BA29B
Kernel loadable modules in backtrace (with dependencies):
com.apple.ATIRadeon9700(4.1.8)@0x8d8000
dependency: com.apple.iokit.IOPCIFamily(1.7)@0x48d000
dependency: com.apple.iokit.IOGraphicsFamily(1.4.2)@0x85a000
dependency: com.apple.iokit.IONDRVSupport(1.4.2)@0x87e000
Proceeding back via exception chain:
Exception state (sv=0x4299D280)
previously dumped as "Latest" state. skipping...
Exception state (sv=0x43D0D000)
PC=0x9000AF48; MSR=0x0200F030; DAR=0x0ECA77FE; DSISR=0x42000000; LR=0x9000AE9C; R1=0xBFFFD6C0; XCP=0x00000030 (0xC00 - System call)
Kernel version:
Darwin Kernel Version 8.11.0: Wed Oct 10 18:26:00 PDT 2007; root:xnu-792.24.17~1/RELEASE_PPC
panic(cpu 0 caller 0xFFFF0003): 0x300 - Data access
Latest stack backtrace for cpu 0:
Backtrace:
0x000954F8 0x00095A10 0x00026898 0x000A8204 0x000ABB80
Proceeding back via exception chain:
Exception state (sv=0x4299D280)
PC=0x008FC020; MSR=0x00009030; DAR=0x3900FF1C; DSISR=0x40000000; LR=0x008FE348; R1=0x2C47B9F0; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x008FE348 0x008E0014 0x002E9A80 0x002EB94C 0x0008C248 0x00029234
0x000233F8 0x000ABEAC 0xFF9BA29B
Kernel loadable modules in backtrace (with dependencies):
com.apple.ATIRadeon9700(4.1.8)@0x8d8000
dependency: com.apple.iokit.IOPCIFamily(1.7)@0x48d000
dependency: com.apple.iokit.IOGraphicsFamily(1.4.2)@0x85a000
dependency: com.apple.iokit.IONDRVSupport(1.4.2)@0x87e000
Exception state (sv=0x43D0D000)
PC=0x9000AF48; MSR=0x0200F030; DAR=0x0ECA77FE; DSISR=0x42000000; LR=0x9000AE9C; R1=0xBFFFD6C0; XCP=0x00000030 (0xC00 - System call)
Kernel version:
Darwin Kernel Version 8.11.0: Wed Oct 10 18:26:00 PDT 2007; root:xnu-792.24.17~1/RELEASE_PPC

2011 imac not booting after os x yosemite installed...just beeps with black screen

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