After I reset PMU, my power light turns on ... but nothing else

My computer was shutting down today intermittently
actually it has been doing this for a month now, on and off
so today I opened it up and thought I was doing the right thing by pushing that reset PMU button
but now when I plug it back in
the power light is bright but wont do anything else
even when I hold it down
it wont power off like it should
any thoughts here ?

That button should be pressed as part of procedure in these two documents.
http://support.apple.com/kb/HT1436
http://support.apple.com/kb/HT1939
There are two because I don't know which model Power Mac G5 you have. If you have the earlier model and did not unplug everything when you pressed the button last time, I think that is an important part of the procedure. Since you already pressed the button once, you may want to use the alternate method of disconnecting everything and leaving it unpowered for a few minutes before reconnecting. When you reconnect the power, initially connect just the keyboard and mouse (leave the other peripherals off) when you try to start it up.

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Interval Since Last Panic Report: 74882 sec
Panics Since Last Report:          2
Anonymous UUID: C2EACECC-F8B9-4762-8CEE-F3A9B9FE756A
Fri Jun 15 18:29:27 2012
panic(cpu 0 caller 0xffffff7f80918947): NVRM[0/1:0:0]: Read Error 0x00000100: CFG 0xffffffff 0xffffffff 0xffffffff, BAR0 0xd2000000 0xffffff809f006000 0x0a5480a2, D0, P2/4
Backtrace (CPU 0), Frame : Return Address
0xffffff807b8132b0 : 0xffffff8000220792
0xffffff807b813330 : 0xffffff7f80918947
0xffffff807b8133c0 : 0xffffff7f80a08aa4
0xffffff807b813410 : 0xffffff7f80a08b64
0xffffff807b813470 : 0xffffff7f80cb5749
0xffffff807b8135b0 : 0xffffff7f80a27bed
0xffffff807b8135e0 : 0xffffff7f809222c2
0xffffff807b813690 : 0xffffff7f8091dbc4
0xffffff807b813880 : 0xffffff7f8091f7c9
0xffffff807b813960 : 0xffffff7f817c4130
0xffffff807b8139a0 : 0xffffff7f817d3790
0xffffff807b8139c0 : 0xffffff7f817ef3f4
0xffffff807b813a00 : 0xffffff7f817ef459
0xffffff807b813a40 : 0xffffff7f817d7605
0xffffff807b813a90 : 0xffffff7f8178df6f
0xffffff807b813b10 : 0xffffff7f8178c9e0
0xffffff807b813b40 : 0xffffff7f81792435
0xffffff807b813b70 : 0xffffff800065553d
0xffffff807b813be0 : 0xffffff80006558dc
0xffffff807b813c40 : 0xffffff800065609b
0xffffff807b813d80 : 0xffffff80002a3f08
0xffffff807b813e80 : 0xffffff8000223096
0xffffff807b813eb0 : 0xffffff80002148a9
0xffffff807b813f10 : 0xffffff800021bbd8
0xffffff807b813f70 : 0xffffff80002aef20
0xffffff807b813fb0 : 0xffffff80002daa33
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com.apple.NVDAResman(7.1.8)[560E1257-BF5E-3B0B-95F0-15033A0D1B97]@0xffffff7f808 b8000->0xffffff7f80b91fff
dependency: com.apple.iokit.IOPCIFamily(2.6.8)[F63D4ABE-42DA-33EF-BADD-3415B0CB0179]@0xffff ff7f80843000
dependency: com.apple.iokit.IONDRVSupport(2.3.2)[D05CFB53-FB72-3613-8162-2D188DB04738]@0xff ffff7f808a6000
dependency: com.apple.iokit.IOGraphicsFamily(2.3.2)[2D2A4A31-EB4F-3730-BE3A-76C061685FC5]@0 xffffff7f8086e000
com.apple.nvidia.nv50hal(7.1.8)[7596DB8C-AE9D-3C87-B11A-0ED8F940CAF8]@0xffffff7 f80b92000->0xffffff7f80eb3fff
dependency: com.apple.NVDAResman(7.1.8)[560E1257-BF5E-3B0B-95F0-15033A0D1B97]@0xffffff7f808 b8000
com.apple.GeForce(7.1.8)[00925AF3-22EE-3858-8BD3-06AE57DFCC86]@0xffffff7f817750 00->0xffffff7f81834fff
dependency: com.apple.NVDAResman(7.1.8)[560E1257-BF5E-3B0B-95F0-15033A0D1B97]@0xffffff7f808 b8000
dependency: com.apple.iokit.IONDRVSupport(2.3.2)[D05CFB53-FB72-3613-8162-2D188DB04738]@0xff ffff7f808a6000
dependency: com.apple.iokit.IOPCIFamily(2.6.8)[F63D4ABE-42DA-33EF-BADD-3415B0CB0179]@0xffff ff7f80843000
dependency: com.apple.iokit.IOGraphicsFamily(2.3.2)[2D2A4A31-EB4F-3730-BE3A-76C061685FC5]@0 xffffff7f8086e000
BSD process name corresponding to current thread: WindowServer
Mac OS version:
11E53
Kernel version:
Darwin Kernel Version 11.4.0: Mon Apr 9 19:32:15 PDT 2012; root:xnu-1699.26.8~1/RELEASE_X86_64
Kernel UUID: A8ED611D-FB0F-3729-8392-E7A32C5E7D74
System model name: MacBookPro6,2 (Mac-F22586C8)
System uptime in nanoseconds: 1415238441194
last loaded kext at 45731121681: com.apple.driver.AppleHWSensor            1.9.5d0 (addr 0xffffff7f81e97000, size 28672)
last unloaded kext at 376926463799: com.apple.driver.AppleUSBUHCI            4.4.5 (addr 0xffffff7f8109d000, size 65536)
loaded kexts:
com.manycamllc.driver.ManyCamDriver            0.0.9
com.apple.driver.AppleHWSensor            1.9.5d0
com.apple.filesystems.autofs            3.0
com.apple.driver.AppleMikeyHIDDriver            122
com.apple.driver.AppleHDA            2.2.0f3
com.apple.driver.AppleUpstreamUserClient            3.5.9
com.apple.driver.AppleMCCSControl            1.0.26
com.apple.driver.AppleMikeyDriver            2.2.0f3
com.apple.driver.AudioAUUC            1.59
com.apple.driver.AGPM            100.12.42
com.apple.driver.AppleIntelHDGraphics            7.1.8
com.apple.driver.AppleIntelHDGraphicsFB            7.1.8
com.apple.driver.SMCMotionSensor            3.0.2d6
com.apple.driver.AppleSMCPDRC            5.0.0d0
com.apple.iokit.IOUserEthernet            1.0.0d1
com.apple.iokit.IOBluetoothSerialManager            4.0.5f11
com.apple.driver.AppleSMCLMU            2.0.1d2
com.apple.Dont_Steal_Mac_OS_X            7.0.0
com.apple.driver.AudioIPCDriver            1.2.2
com.apple.GeForce            7.1.8
com.apple.driver.ACPI_SMC_PlatformPlugin            5.0.0d0
com.apple.driver.AppleMuxControl            3.0.16
com.apple.driver.AppleLPC            1.5.8
com.apple.driver.AppleUSBTCButtons            225.2
com.apple.driver.BroadcomUSBBluetoothHCIController            4.0.5f11
com.apple.driver.AppleUSBCardReader            3.0.1
com.apple.driver.AppleUSBTCKeyboard            225.2
com.apple.driver.AppleIRController            312
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless            1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib            1.0.0d1
com.apple.BootCache            33
com.apple.iokit.SCSITaskUserClient            3.2.0
com.apple.driver.XsanFilter            404
com.apple.iokit.IOAHCISerialATAPI            2.0.3
com.apple.iokit.IOAHCIBlockStorage            2.0.3
com.apple.driver.AppleSmartBatteryManager            161.0.0
com.apple.driver.AppleFWOHCI            4.8.9
com.apple.driver.AirPort.Brcm4331            530.4.20
com.apple.driver.AppleUSBHub            4.5.0
com.apple.iokit.AppleBCM5701Ethernet            3.1.2b2
com.apple.driver.AppleEFINVRAM            1.5.0
com.apple.driver.AppleAHCIPort            2.3.0
com.apple.driver.AppleACPIButtons            1.5
com.apple.driver.AppleUSBEHCI            4.5.8
com.apple.driver.AppleRTC            1.5
com.apple.driver.AppleHPET            1.6
com.apple.driver.AppleSMBIOS            1.8
com.apple.driver.AppleACPIEC            1.5
com.apple.driver.AppleAPIC            1.5
com.apple.driver.AppleIntelCPUPowerManagementClient            193.0.0
com.apple.nke.applicationfirewall            3.2.30
com.apple.security.quarantine            1.3
com.apple.driver.AppleIntelCPUPowerManagement            193.0.0
com.apple.kext.triggers            1.0
com.apple.driver.DspFuncLib            2.2.0f3
com.apple.driver.AppleSMBusController            1.0.10d0
com.apple.iokit.IOSurface            80.0.2
com.apple.iokit.IOSerialFamily            10.0.5
com.apple.iokit.IOFireWireIP            2.2.4
com.apple.driver.AppleHDAController            2.2.0f3
com.apple.iokit.IOHDAFamily            2.2.0f3
com.apple.iokit.IOAudioFamily            1.8.6fc17
com.apple.kext.OSvKernDSPLib            1.3
com.apple.driver.ApplePolicyControl            3.0.16
com.apple.driver.AppleSMC            3.1.3d8
com.apple.driver.IOPlatformPluginLegacy            5.0.0d0
com.apple.driver.AppleSMBusPCI            1.0.10d0
com.apple.driver.AppleGraphicsControl            3.0.16
com.apple.driver.IOPlatformPluginFamily            5.1.0d17
com.apple.driver.AppleBacklightExpert            1.0.3
com.apple.nvidia.nv50hal            7.1.8
com.apple.NVDAResman            7.1.8
com.apple.iokit.IONDRVSupport            2.3.2
com.apple.iokit.IOGraphicsFamily            2.3.2
com.apple.driver.AppleUSBBluetoothHCIController            4.0.5f11
com.apple.iokit.IOBluetoothFamily            4.0.5f11
com.apple.iokit.IOSCSIBlockCommandsDevice            3.2.0
com.apple.iokit.IOUSBMassStorageClass            3.0.1
com.apple.driver.AppleUSBMultitouch            227.1
com.apple.iokit.IOUSBHIDDriver            4.4.5
com.apple.iokit.IOSCSIMultimediaCommandsDevice            3.2.0
com.apple.iokit.IOBDStorageFamily            1.6
com.apple.iokit.IODVDStorageFamily            1.7
com.apple.iokit.IOCDStorageFamily            1.7
com.apple.driver.AppleUSBMergeNub            4.5.3
com.apple.driver.AppleUSBComposite            4.5.8
com.apple.iokit.IOSCSIArchitectureModelFamily            3.2.0
com.apple.iokit.IOFireWireFamily            4.4.5
com.apple.iokit.IO80211Family            420.3
com.apple.iokit.IOEthernetAVBController            1.0.1b1
com.apple.iokit.IONetworkingFamily            2.1
com.apple.iokit.IOUSBUserClient            4.5.8
com.apple.iokit.IOAHCIFamily            2.0.8
com.apple.driver.AppleEFIRuntime            1.5.0
com.apple.iokit.IOHIDFamily            1.7.1
com.apple.iokit.IOUSBFamily            4.5.8
com.apple.iokit.IOSMBusFamily            1.1
com.apple.security.sandbox            177.5
com.apple.kext.AppleMatch            1.0.0d1
com.apple.security.TMSafetyNet            7
com.apple.driver.DiskImages            331.6
com.apple.iokit.IOStorageFamily            1.7.1
com.apple.driver.AppleKeyStore            28.18
com.apple.driver.AppleACPIPlatform            1.5
com.apple.iokit.IOPCIFamily            2.6.8
com.apple.iokit.IOACPIFamily            1.4
Model: MacBookPro6,2, BootROM MBP61.0057.B0F, 2 processors, Intel Core i7, 2.66 GHz, 4 GB, SMC 1.58f15
Graphics: NVIDIA GeForce GT 330M, NVIDIA GeForce GT 330M, PCIe, 512 MB
Graphics: Intel HD Graphics, Intel HD Graphics, Built-In, 288 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533642465238432D47372020
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533642465238432D47372020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x93), Broadcom BCM43xx 1.0 (5.106.198.4.20)
Bluetooth: Version 4.0.5f11, 2 service, 11 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: Hitachi HTS545050B9SA02, 500.11 GB
Serial ATA Device: MATSHITADVD-R   UJ-898
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfa100000 / 2
USB Device: Optical USB Mouse, 0x046d (Logitech Inc.), 0xc016, 0xfa140000 / 6
USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0237, 0xfa120000 / 5
USB Device: BRCM2070 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 4
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8218, 0xfa113000 / 9
USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0xfa130000 / 3
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2
USB Device: Built-in iSight, apple_vendor_id, 0x8507, 0xfd110000 / 4
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd120000 / 3

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Typing in all caps indicates shouting, is considered rude, and is difficult toread. Many will not read such posts.
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When I press the power button, the screen turns on but nothing shows up., When I press the power button, the screen turns on but nothing shows up., When I press the power button, the screen turns on but nothing shows up.

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What can i do to fix this 2 problems.
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