How can you tell if iMac is worth fixing or replacing?

I bought 2 iMacs at a yard sale. One, is just a shell and has no guts and is pretty much a paper weight. The other is the A1076 20 in version. I opened it up and it is missing the power supply, HD, and a couple other components. Other than that, it seems to be in ok shape visually.

How can I tell if it is worth getting the parts to get it running. Is there a way to test it somehow to see if the screen/works works or if the logic board is good? I looked it up online and all the parts would run me about $600 +/-. Would LOVE to fix it up, but don't want to spend the cash to rebuild it if it turns out be around the same price to buy a new one.

Thanks for any help in advance.

Dzyner

Update

Thanks for your answers. Mactech plus: The logic board looks OK, I am pretty proficient in repair on Macs, replacing HDs, keyboards, etc, but DO NOT know anything regarding the logic board. I looked at it and it seems OK. No seepage or anything like that from anything.

Is there a way to test the circuits or to see if the display will work without buying all the stuff first?

Thanks again for your opinions.

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The G5 iMac has been having so much problems with Capacitors in the power supply and logic board that unless you just have money to blow I would just use them as paper weights and use the money to buy an Intel iMac off of ebay or a new one. I have a G5 iMac that Apple repaired and it lasted 9 months before the Capacitors on the board Apple replaced started leaking. I have a set of replacement Capacitors for it but think I will just use it as a paper weight.

It really is not worth it IN MY OPINION. Others may say go of it and it is your money.

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agreed, sell the parts on eBay

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I think that mactech is right - if you can't repair it by yourself - please do yourself a favour and forget it, sell the stuff and get a working one.

(here comes a little explanation - thats only my opinion -)

i like the old g5 better than the isight or intel models - all iMacs have their problems - the new ones have also problems.

think about it - 600$ - thats a lot of cash - especially in a country where mac's are kinda bargain, a 21.5" costs 1199$ in the us apple store - the same model costs in germany 1099€ - thats 1484$

- BUT - lets come back to the G5 - i paid for a defective 20" G5 115$ (87€) - shipping included, chaged parts for about 10$ and the beaast was working again - thats a priceclass where i would buy it again, even if a had to do some stuff every 9 month - but that is only my opinion and thats only because i can fix those problems on my own.

if you can't change capacitors or rework the gpu - do yourself a favour and forget it (as i said above)

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+ good

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Even assuming the LB is OK, that computer at this point in time is only worth $500-600, in my opinion. Probably not worth the effort, sadly. What other components are missing? PSs are only about $120 and HDs are cheap. Just wondering what it needs that's worth $600.

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+ sound advice, nice to see you back.

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I got one working again by changing the caps (not really easy to do) and baked the logicboard 45 min at 140 degree centigrade (not kidding) I know it's kind of a cowboy repair (don't forget to remove the backup battery before you put it in the oven, i did). It works a charm now but i woudn't sell a "repair" like that.

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hi karsten, long time no see - the good old baking method can work, but 140°C is almost to low for Pb free solderings - btw: never use a aluminum baking tray - it would take some time to find all the parts in the oven

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I'll have you to know cowboys use bob wire and duck tape for repairs. Them toes your a steppin' on are the tips of my ridin' boots.

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