Re: imac G5 Celetronix P/N :614-0363
Hi, thanks for the hint. Sorry, even after rereading it several times and rethinking several days, I cannot get the clou out of #40. Could you be a little more verbose? (-:
herrdeh
Member
Last Activity: 04-22-2015, 05:46 AM
Joined: 01-06-2012
Location: Nuernberg, Germany
-
Re: imac G5 Celetronix P/N :614-0363
Could you please give me an idea what you mean by 'control rail'? Yet, I can't imagine what to look for or to think about.
Tks a lot,
herrdehLeave a comment:
-
Re: imac G5 Celetronix P/N :614-0363
Hi everybody,
having a iMac Core Duo 20" (2006, i guess) here which is completely dead.
I had a look at the PSU and found that I dont want to repair it.
Instead, I tried to attach an external power supply (nice side effect: less thermal load within the iMac case.)
So I soldered cables from the 2 gray and 2 black cables to the AC connector. Took care for polarity and connected a 12V /25A PSU - but nothing happens, iMac wont boot. PSU says a circuit of 0,9 ... 1,7A (not steady) is on. Pressing...Leave a comment:
-
PowerMac G4 wakes from sleep when light is switched
Hi everybody,
already tried nearly everything to cure the following:
My PowerMac G4 wakes from sleep, when either I switch on/off a transformer-powered low-voltage lighting chain, or my gas heating's electronic ignition fires.
I tried a UPS to separate the machine from the power grid - no difference. I pulled all cables (ethernet, USB, speakers etc) - no difference.
No other computer in my flat does so - unluckily I never had another PM G4 to check.
Any ideas would be very welcome.
Greetings,
... -
Re: PSU imac G5 shot when testing
Dunnit!
Wow - it was quite easy. Apart from setting apart the machine just something like 5 mins. I used Kolophonium as a flux - now I know why I did some music centuries ago.
It has been working for 10 hrs now - so I'm a bit optimistic.
Thank you very much for your support.
Greetings,
WolfLeave a comment:
-
Re: PSU imac G5 shot when testing
Hi everybody,
sorry for the long time not to answer - life tends to be complicated these days.
I was given a little butane gas torch, which makes a nice little (0.5cm long) blue gas flame. I thought about using that one for the reflow job - as it gives the heat very concentrated. - Or - does it focus too much?
Yours, WolfLeave a comment:
-
Re: PSU imac G5 shot when testing
This is what the beast looks like…...Last edited by herrdeh; 01-13-2012, 11:46 AM.Leave a comment:
-
Re: PSU imac G5 shot when testing
This one looks quite good to me:
[URL="http://www.ifixit.com/Answers/View/18484/video+graphics+and+boot+issues#answer25025"]http://www.ifixit.com/Answers/View/18484/video+graphics+and+boot+issues#answer25025[/URL]
? ((-;
Yours, WolfRe: PSU imac G5 shot when testing
This one looks quite good to me:
[URL="http://www.ifixit.com/Answers/View/18484/video+graphics+and+boot+issues#answer25025"]http://www.ifixit.com/Answers/View/18484/video+graphics+and+boot+issues#answer25025[/URL]Leave a comment:
-
Re: PSU imac G5 shot when testing
BTW.: Can I do some test to be sure GPU reballing for sure will do? - Press down and hold a certain position on the heatsink to improve connections manually - like some folks did with Powerbooks ?
Greetings, WolfLeave a comment:
-
Re: PSU imac G5 shot when testing
Hi - I'm back again after a week of lots of other stuff.
The PSU is functional again. Dont know why, didnt do a thing. But noticed that it will only start if load is attached - read before, that such devices exist.
12V lane reads 11.7V under heavy load (round 4A) - does that matter?
And now - reballing/reflow…
I dont have the equipment for reballing, neither any experience. If it were an Intel imac - allright, send it to a equipped workshop, pay 60 or 80€ - done.
...Leave a comment:
-
Re: PSU imac G5 shot when testing
Gosh - looks like the hard way.
PSU first - allright. Does anyone know where I could get a circuit diagramme?
Yours, WolfLeave a comment:
-
Re: PSU imac G5 shot when testing
Hi, wow - such a quick reply, that's great!
Yesterday I wasnt allowed to edit my profile - but now it's done.
Hometown: Lebkuchen City.
The PSU is a DPS-180QB A Rev. 02
S/N: MV448MAJRZYB
I'm quite sure I really did my load test on the purple line.
NB.: The unit now does a very gentle sort of buzzing - pulsating about 1/sec.
I'll ask my relative when the mobo swap was done. "Common video GPU BGA failure" means, the oven reflow idea would have been the right thing to...Leave a comment:
-
PSU imac G5 shot when testing
Hi everybody,
wow - it took me years to this forum which so closely covers problems which come along so often…
An imac G5 A1058 was given to me by a relative - it would power up, LED 1&2 light, but LED 3 remains dark. The screen ever remains black, after apx. 30 sec. the CPU fan goes to full power. An external monitor would neither receive any signal.
The motherboard already was swapped by Apple service, all caps read good values on an ESR meter.
There is the idea of toasting the mobo for reflow - but as this is not the really gentle...
No activity results to display
Leave a comment: