Question about Apple BTO PM G5/1600 Mac Desktop

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Removing cpu Hi I have a PM G5 2.3GHZ. I would like to swap PSU: how do I remove the CPU in order to replace psu?

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It is clearly laid out in your computer documentation, but go here... I could restate the facts, but just read the thing for yourself, http://forum.insanelymac.com/index.php?showtopic=77290
BTW, it is the hardest and potentially most destructive thing you can do yourself, replacing the PSU.... good luck...

Posted on Dec 25, 2008

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You might be able to find diagrams on xlr8yourmac.com. Personally I wouldn't risk it if you don't know how to possibly soder stuff to the logic board. The G5 and Intel based Mac don't have the nice zif type processors of the G3/G4 days.

Posted on Sep 01, 2008

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I rebuilt computer with new parts, now won't start up. No POST. Power LED lights up, no cpu fans spin, no beeps. Psu works with paper clip test. New mobo, ram, psu, cpu.


Check display without cabinet maybe motherboard getting short with cabinet and try new Power supply check all the power supply connectors connected or not .

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1 long beep, 2 short beep


You have a bad RAM, install just 1 module and try, is doesn't swap the memory module and try again.

http://www.gigabyte.com/support-downloads/faq-page.aspx?fid=816

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Emachines T2042 does not power up. what could be the reason? a faulty switch or a faulty power supply? The power cord is fine. There is also some spark when I plug the power cord into the cpu whiles its...


Not usually, what you need to do is see if the fan in the back of the PSU, runs at switch on... If it does NOT, there is a good chance your PSU has "Blown" this is a simple replacement, and quite cheap. You need to troubleshoot the PC, you need to also see if the fan on CPU goes at all, even a "Flick" at turn on? To see whats what, remove all Drives DVD and cards, then power on, if No GO then probably PSU.. IF OK replace things until, it stops, that is your problem.. Also remove a stick of RAM, and swap about if two to test them... A machine will boot with just RAM, but will complain..remove and introduce things one by one until you find problem, if you do all that and it is NOT, the, PSU, RAM, CARDS, HARD DRIVE, DVD, then it is your Motherboard. Try that see how you go.

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Acer Aspire AM1640-U1401A has black screen-@ boot attempt.


Had this issue with two Acers of similar make. Replacing the Motherboard resolved the issue on both.

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1 Answer

Ms7241 mobo no post no display


I'm just going to post some stuff, and you see what you may think may help.

1.I hope you observed the anti-static guidelines, or you have silently toasted your delicate computer components. Static will silently fry them out. You won't see it or feel it.

(Reseated CPU? Static will fry that thing out F-A-S-T! Didn't clean the top of the CPU, and the bottom of the heatsink, and apply new thermal paste? CPU is fried. Takes about 10 minutes or so for an Intel. Takes about 20 to 30 seconds for an AMD!)
2.Floppy drive has no power? It attaches straight to the PSU. Either it is bad, or the PSU. Even if you swapped PSU's, it doesn't mean the one you installed is good.
If the PSU has a weak voltage rail, it won't give enough wattage to the processor.

A.ALL the lights use less than 1 watt.
B.EACH fan uses 2 to 3 Watts.
C.A harddrive sitting there spinning, because there is no processor to tell it what to do, uses about 2 to 3 Watts. (Read on)
D.When BIOS tries to turn the processor on, it can't. Why? Because processors use anywhere from 55 watts to 125 watts. Depends on the processor. If the PSU has a weak voltage rail, the processor won't turn on.

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Hardware monitor found an error


Diagnosis: Lack of P.S.U. fan speed report indicates P.S.U. fan sensor damaged by overheating. This was caused by cooling fin blockage since the Sony design on this model cools the C.P.U. THROUGH the P.S.U.
Expert level fix: Remove P.S.U. Remove C.P.U. fan and vacuum. Remove C.P.U. cooling fins from C.P.U. and cooling fan mounts from fin box, vacuum. Reassemble C.P.U cooling system. Replace P.S.U. with O.E.M. part only since in this case it is proprietary to the unit.

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2 Answers

Asrock P4i65G Motherboard


If the CPU is dead the problems can be
  1. no power
  2. no fans etc or
  3. power, no beeps (errors)
If the Ram is not compatible it would be constant beeping.

With the board in, and power supply 20pin + 4pin Pent 4 power attached,(#2 and #7 of motherboard layout) remove power cord from power supply.
CLRCMOS0 allows you to clear the data in CMOS. The data in CMOS includes
system setup information such as system password, date, time, and system
setup parameters. To clear and reset the system parameters to default setup,
please turn off the computer and unplug the power cord from the power
supply. After waiting for 15 seconds, use a jumper cap to short 2 pins on
CLRCMOS0 for 5 seconds. Remove the jumper. Remove heatsink and fan from CPU. disconnect cpu and reseat it. Re-install heatsink and fan. Plug in the power cord. Try to boot up. If it still does not boot and (no power, no fans etc.) problem would then be cpu is fried.



Jun 02, 2008 | Computers & Internet

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