I have a Apple MacIntosh Performa 5260/120 that does not turn on. I have checked cables and electrical outlet and no problems. Nothing is happening, no screen, no bip, no noise, nothing. Can you help please ?
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The LG 32LD550 television has HDMI and VGA. Your iMac has a mini-DVI output port with support for DVI, VGA, S-video, and composite video connections via adapter. So all you need is either: 1) mini-DVI to VGA adapter. 2) mini-DVI to HDMI adapter.
HDMI is better quality, and so I'd recommend something like this: http://www.amazon.com/PTC-Mini-DVI-Adapter-6ft-Macintosh/dp/B001H0REVK (You may want a longer cable though).
It is best to check with an Apple store, assuming there is one within 100 miles or so, especially if you are under AppleCare, yet--unlikely. My 20" iMac G5 gave up the ghost a year ago. Their cost to repair/replace the logic board was >$800. I've heard 3rd party as low as ~$500. I decide to change to an MacBook 13" (Early 2009 white, then current) and love its convenience.
Try the Macintosh boards where I have posted http://discussions.apple.com/category.jspa?categoryID=134 "Apple - Support - Discussions - iMac G5". No luck for me though.
If you have the early G5 that I have, pull power plug and any cables, place face on non-scratching surface, rotate 1/2(?) turn the 3 screws on the bottom, lift off the back and stand, use the power cord to try to start it. There is a button for this but varies with models. If only one LED lights or 2 for a short time you may have my problem. First, after the back is off check if the capacitor tops are bulging. If so that is a known repair, but its coverage expired.
You might want to try the Apple Mac OS USB DDK - 1.5.5f1, which has 3rd party support for USB cards
choose the Mac OS USB DDK 1.5.5 for Mac OS 9 (IMG)
Copy the extension into your System Folder:Extensions Folder and restart
Could be either or both of two problems. One is signal routing: some monitors want synch on green, some want separate synch. The VGA adapters come in different types for each, and some adapters have switches on them to select your monitor type. You may need a different adapter. The other issue is resolutions and refresh. You have to tell your Mac to use a resolution that the monitor can accept. You may have to use software like SwitchRes to enable non-Apple resolutions.