IMac G3 suddenly stopped working

Hi. I bought an iMac 400 G3 on ebay and it worked fine for 2-3 weeks. It ran OS 9 and NO attempt was made to upgrade to OSX as my kids liked Bugdom. Anyway one day absolutely nothing happened when trying to turn it on. I replaced the battery, pressed PRAM button once only and tried to start again. The only difference now was that I heard a crackle as if the monitor was firing up but that was it, not another sound or light was present. I have spare parts I can use, but rather than hit and miss, perhaps someone has an idea where to start. Thanks in advance.

This seems to be a problem with the hardware.
See the section by spudnuty on how to reset the PMU:
http://discussions.apple.com/thread.jspa?messageID=4795818
In case the video is acting up, see spudnuty's post:
http://discussions.apple.com/thread.jspa?messageID=5287121#5287121
Robert

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com.apple.AppleFSCompression.AppleFSCompressionTypeZlib     1.0.0d1 com.apple.BootCache     34 com.apple.driver.AppleIRController     320.15 com.apple.iokit.SCSITaskUserClient     3.5.5 com.apple.driver.AppleUSBCardReader     3.1.7 com.apple.driver.XsanFilter     404 com.apple.iokit.IOAHCIBlockStorage     2.3.1 com.apple.driver.AppleUSBHub     5.5.5 com.apple.driver.AppleFWOHCI     4.9.6 com.apple.driver.AirPort.Atheros40     600.72.2 com.apple.driver.AppleRTC     1.5 com.apple.driver.AppleAHCIPort     2.5.2 com.apple.nvenet     2.0.19 com.apple.driver.AppleUSBEHCI     5.5.0 com.apple.driver.AppleUSBOHCI     5.2.5 com.apple.driver.AppleEFINVRAM     1.7 com.apple.driver.AppleHPET     1.8 com.apple.driver.AppleACPIButtons     1.7 com.apple.driver.AppleSMBIOS     1.9 com.apple.driver.AppleACPIEC     1.7 com.apple.driver.AppleAPIC     1.6 com.apple.driver.AppleIntelCPUPowerManagementClient     196.0.0 com.apple.nke.applicationfirewall     4.0.39 com.apple.security.quarantine     2.1 com.apple.driver.AppleIntelCPUPowerManagement     196.0.0 com.apple.driver.DspFuncLib     2.3.7fc4 com.apple.iokit.IOAudioFamily     1.8.9fc11 com.apple.kext.OSvKernDSPLib     1.6 com.apple.driver.IOPlatformPluginLegacy     1.0.0 com.apple.driver.AppleSMBusPCI     1.0.11d0 com.apple.driver.IOPlatformPluginFamily     5.3.0d51 com.apple.driver.AppleBacklightExpert     1.0.4 com.apple.driver.AppleSMBusController     1.0.11d0 com.apple.kext.AMD4600Controller     8.1.2 com.apple.kext.AMDSupport     8.1.2 com.apple.iokit.IOSurface     86.0.4 com.apple.iokit.IOSerialFamily     10.0.6 com.apple.iokit.IOBluetoothFamily     4.1.4f2 com.apple.driver.AppleGraphicsControl     3.4.5 com.apple.iokit.IONDRVSupport     2.3.7 com.apple.iokit.AppleBluetoothHCIControllerUSBTransport     4.1.4f2 com.apple.kext.triggers     1.0 com.apple.iokit.IOFireWireIP     2.2.5 com.apple.driver.AppleSMC     3.1.4d2 com.apple.driver.AppleHDAController     2.3.7fc4 com.apple.iokit.IOGraphicsFamily     2.3.7 com.apple.iokit.IOHDAFamily     2.3.7fc4 com.apple.iokit.IOUSBHIDDriver     5.2.5 com.apple.iokit.IOSCSIMultimediaCommandsDevice     3.5.5 com.apple.iokit.IOBDStorageFamily     1.7 com.apple.iokit.IODVDStorageFamily     1.7.1 com.apple.iokit.IOCDStorageFamily     1.7.1 com.apple.iokit.IOSCSIBlockCommandsDevice     3.5.5 com.apple.iokit.IOUSBMassStorageClass     3.5.1 com.apple.driver.AppleUSBMergeNub     5.5.5 com.apple.driver.AppleUSBComposite     5.2.5 com.apple.iokit.IOAHCISerialATAPI     2.5.1 com.apple.iokit.IOSCSIArchitectureModelFamily     3.5.5 com.apple.iokit.IOUSBUserClient     5.5.5 com.apple.iokit.IOFireWireFamily     4.5.5 com.apple.iokit.IO80211Family     530.4 com.apple.iokit.IOAHCIFamily     2.3.1 com.apple.iokit.IONetworkingFamily     3.0 com.apple.iokit.IOUSBFamily     5.6.0 com.apple.driver.NVSMU     2.2.9 com.apple.driver.AppleEFIRuntime     1.7 com.apple.iokit.IOHIDFamily     1.8.1 com.apple.iokit.IOSMBusFamily     1.1 com.apple.security.sandbox     220.3 com.apple.kext.AppleMatch     1.0.0d1 com.apple.security.TMSafetyNet     7 com.apple.driver.DiskImages     345 com.apple.iokit.IOStorageFamily     1.8 com.apple.driver.AppleKeyStore     28.21 com.apple.driver.AppleACPIPlatform     1.7 com.apple.iokit.IOPCIFamily     2.7.3 com.apple.iokit.IOACPIFamily     1.4 com.apple.kec.corecrypto     1.0 Model: iMac10,1, BootROM IM101.00CC.B00, 2 processors, Intel Core 2 Duo, 3.06 GHz, 4 GB, SMC 1.53f13 Graphics: ATI Radeon HD 4670, ATI Radeon HD 4670, PCIe, 256 MB Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz, 0x802C, 0x31364A53463235363634485A2D3147314631 Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1067 MHz, 0x802C, 0x31364A53463235363634485A2D3147314631 AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x8F), Atheros 9280: 4.0.72.0-P2P Bluetooth: Version 4.1.4f2 12041, 2 service, 18 devices, 1 incoming serial ports Network Service: Ethernet, Ethernet, en0 Network Service: AirPort, AirPort, en1 Serial ATA Device: Hitachi 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