My iMac G5 will not power up

hi this may be a bit of a long explanation but i really need help.
I just got a G5 from a friend of mine that needed a new hard drive. Having worked on many computers before i decided to buy a hard drive and do it myself. So after taking it apart the first time i couldn't figure out how to take out the hard drive (yes i felt very stupid when i finally got it right)after unscrewing and re-screwing several brackets back in i gave up for a while. after doing a bit more research i came back to it and changed out the hard drive. there was one complication, the iSight wiring came unglued and is now disconnected as well as the installation disk being in the drive. Now it wont turn on, i get the light in front, and the chime (not always a full chime) Ive tried resetting both smu and pram but it just keeps shutting down during the chime. the screen has no picture and is completely blank.
Please if anyone knows how to fix or if this can be fixed i have a lot of resources so any suggestions will be useful i just don't want to have to pay a lot of money out of pocket just to fix this
Thank you in advanced

Hi Raivyn, and a warm welcome to the forums!
Tough to tell what else may be loose in there, but...
Did you check for bulging CVapacitors...
http://macsimumnews.com/macosgforums/viewtopic.php?f=49&t=4124
http://x704.net/bbs/viewtopic.php?f=8&t=2560
Then a strange cure in the last post here...
http://forums.macnn.com/58/imac-emac-and-mac-mini/371428/freaking-out-imac-g5-tu rned-itself/

Similar Messages

  • Imac i5 will not power on

    My intel based iMac i5 will not power on today.
    It worked fine last night.
    I tried to turn it on and I got the chime but nothing else. No sounds or display.
    I attempted to reset smc with no resolve.
    At one point after resetting I did get the fan to come on. The fan would run continually until hitting power botton.
    Now I hit power button and Nothing.
    I have had this unit since last December with no issues.
    Any Help would be appreciated.

    You could try a PRAM reset:
    Reset PRAM
    Shut down the computer.
    Locate the following keys on the keyboard: Command, Option, P and R.
    You will need to hold these keys down simultaneously in step 4.
    Turn on the computer.
    Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
    Hold the keys down until the computer restarts and you hear the startup sound for the second time.
    Release the keys.
    If that doesn't help, try a 'safe boot' - restart holding down the shift key until you see the progress bar. If it boots, restart normally from the Apple menu.

  • My 24" iMac just died and will not power-up.  What can I do?

    My 24" iMac just died and will not power-up.  What can I do?

    Bring it into an Apple Store for a free diagnosis and quote for cost of repair/replacement of parts.
    If the costs are $500 or over, consider using the money toward a new or "newer" (used) Mac.

  • IMAC will not power up

    I just purchased an iMAC, unpacked it, set it up, plugged it in and it will not power up

    If it is new, contact Apple immediately.

  • My 2010 imac 21.5 will not power up

    what do i do..my imac will not power up...it comes on, and goes back off....HELP

    Wouldn't that be like, telling you that your car need a new engine and transmission over the phone.
    Take it to your local Apple Store or AASP and have them diagnose the problem.
    Click on the Service section, at > Apple - Find Locations

  • IMac will not power back on. Any ideas?

    I was installing maverick and suddenly my iMac shut down and will not power back on. Any ideas?

    Which model iMac do you have?  If still under warranty or you have AC, call them & let them deal w/it.
    Out of warranty:  Please detail ALL you have done so far in the way of troubleshooting?   Need this info to avoid the been there done that scenarios.

  • IMac will not power up!  Help!

    I have an iMac that for some reason will not power up, at all.
    The specs are: 800 MHz, iMac G4, 512 MB.
    It stopped detecting the available WiFi network in my home regardless of where I located it. So I rest PRAM, and no change. I reset NVRAM and all in open firmware, no change. Pulled the RAM and AirPort card and reseated; no change.
    So I reset the PMU (pushed it quickly and only once) and now it will not start up at all. No fan. No lights. Nothing.
    I don't have any extra plugged into the iMac now. I pulled the RAM and Airport card and have tried booting with and without just the keyboard plugged in.
    I've unplugged it and let it set for over 24 hours and still nothing. I have noticed that when I plug it in, the overhead incandescent bench light on the same circuit dims or flickers ever so slightly for a very brief moment.
    So I'm leaning towards one of the following:
    1. PMU crash meaning I need to replace the logic board
    2. Fried logic board which is likely why the Airport card stopped responding (which, by the way, was somewhat intermitant at first)
    3. PMU crash that can somehow miraculously be reset saving me from having to get a replacement logic board
    4. Bad battery (haven't checked this yet as it seems the machine would show some sign of life if it had a bad battery. This thing is lifeless).

    Hello slee:
    You have, IMHO, analyzed the problem. I think it is time to take the computer to either an Apple store or to an Apple certified repair shop for diagnosis. I do not think you want to begin replacing things that may be OK.
    Barry

  • My brand new iMac will not power up after an update restart, any suggestions?

    Any suggestions on why my IMac will not power up after it done a restart?

    Try an SMC reset and PRAM reset: https://discussions.apple.com/docs/DOC-3603
    If that doesn't help:
    See if it will start in Safe Boot: restart holding down the Shift key until you see a grey progress bar, type your admin password when prompted, let it continue to (hopefully) boot. Restart as normal from the Apple menu.
    If that didn't help, try booting into the Recovery HD: restart holding down Command+r and choose Disk Utility from the four choices when they appear on screen. Once DU has launched select your Macintosh HD on the left and click on 'repair disk'. If anything gets changed click on repair disk again until you get a clear pass, restart as normal from the Apple menu.
    If you still have problems, give AppleCare a call.

  • HT1750 I tried to change the memory and now my Imac will not power on. and there are no beeps. what did I do wrong?

    I tried to change the memory and now my Imac will not power on. and there are no beeps. what did I do wrong?

    Don't know.  Could be any number of reasons.  Re-read the how to install RAM manual again for your model iMac.  Double & triple check to make sure you purchased the right RAM chips.   Make sure they are seated properly.  If you didn't hear a snap when seated, the RAM is not properly seated. 

  • TS1587 My iMac will not power on .

    My iMac will not power on

    Hi I have some weird problem related to this and unfortunately either or apple or APS able to solve.
    I have picked a 27 iMac late 2012 model 2 montsh back and a APC Back up UPS 700.
    Whenevr I turn on the Main power> Turn on APC> Turn on iMac, the iMac doesn't turn on. I will have to unplug it and plug it back it works. It happens only when I start the UPS for the first time in the day. After that how many ever times I remove my iMac plug and plug it back to APC, it turns on.
    Initially I thought, it is the problem with the UPS and contacted APC where they replaced with a new UPS and its the same problem.
    Unfortunately, Apple is not able to tell that its the problem with the Apple iMac as it works fine when directly powered without using APC.
    So, the problem lies working with APC and iMac together.
    Could someone please help. The last option I have is to carry the UPS to a Apple store and see if it works fine with any other iMac.
    Also to mention, I did try SMC reset adn PRAM reset.

  • My imac will not power on

    I just bought my iMac. I used it in the store to set things up and now that I have it at home it will not power on! Super Frustrated!!

    Hi 3olivia,
    Thanks for using Apple Support Communities.  This article has steps to take if your computer will not turn on:
    Troubleshooting: My computer won't turn on
    http://support.apple.com/kb/TS1367
    Cheers,
    - Ari

  • HT3964 Hi ,  My modem got zapped by lightning yesterday.  My iMac still was able to power on when I tried it yesterday.  Today the modem is replaced and internet is working, but now the computer will not power on.  I followed the steps to reset SMC.  Noth

    Hi ,  My modem got zapped by lightning yesterday.  My iMac still was able to power on when I tried it yesterday.  Today the modem is replaced and internet is working, but now the computer will not power on.  I followed the steps to reset SMC.  Nothing. ??

    Ouch, not much more you can do, I think you'll have to have it looked at.

  • My iMac will not power up

    My iMac will not power up. It is a late 2008 21.5 inch. Any suggestions, tricks, soothsaying, or voodoo that one can apply here would be a great help. Thanks.

    If it doesn't have any video and doesn't make any sounds take your 20" (not 21.5") 2008 iMac in for repair, it has suffered a hardware failure. When you say it will not power up please be more descriptive, what exactly happens when you hit the power button and what troubleshooting have you tried?

  • TS1367 I put my iMac to sleep last night and today it will not power on? I have check all cords and outlets and they are fine. What's going on?

    I put my iMac to sleep last night and today it will not power on? I have checked all cords and outlets.  What's going on?

    James did you find a solution? Last night my daughter put her Macbook Pro to sleep and now it won't turn on or charge? I think it is not charging because the light does not come on. We charged mine and the light came on and worked so it is clearly her computer. Help!!!

  • My Powerbook will not power up, but I can hear the fan running...

    Please help!! My Powerbook will not power up, but I can hear the fan running when I press the power button to attempt to power it up. I just received a new power adapter because it wasn't working properly and it was doing this before and then it worked for a week and now it will not power up at all. It just starts the fan but nothing else turns on. When I plug the adapter, with the battery still connected, it will look as if it is charging but then the light on the plug turns from green to orange then off and doesn't power up at all. If I take the battery out and plug in the adapter, the light stays on but it does not power up except for the fan noise. Does anyone have any suggestions? I also followed the two articles listed online in regards to resetting the power setting and the command + alt + P + R as well. Nothing works. Thanks in advance.....

    Same here. If I start up with the power adapter attached, it starts up fine. If I try to start up from battery only, the fan comes on, the sleep light comes on but nothing else happens. I tried letting it sit that way for about 15 minutes and nothing changed. I tried attaching the power cord while in this mode and nothing changed. I tried the PMU reset a couple of times but nothing helps.
    This computer is just over 1 year old and I have not had any problems with the power cord (3rd party), the battery, or any problem like this before. It started after a proper shutdown last night and attempt to start without the power cord this afternoon.
    Any answers to this yet? I think I'll call on this and report any success to this discussion.
    15" PowerBook G4   Mac OS X (10.4.8)   1 GB DDR2 SDRAM, 100 GB HD

Maybe you are looking for