2008 mac pro power supply removal ifix it

2008 MAC PRO POWER SUPPLY REMOVAL IFIX IT HOW TO
2008 MAC PRO POWER SUPPLY REMOVAL IFIX IT MAC OS

I was having the random crashes with a gt640 and went back to 2600. if no sound, and no light from test 1, then it is 100% the 240vac side of the PSU (ie, youve just eliminated half the PSU). Test 2, when plugging in the power cord, you should hear a small mains arc at the power cord socket. Press it, if you get no lights (next to button) at all, the ONLY conclusion you can rely on is it is 90% the 240vac inlet. test 1, there is a tiny white diag button on the logic board, dead centre behind the memory caseing. one dead A1186 PSU, which I'll repair tomorrow (is midnight right now) - I'll post my answers/findings shortly after, HOWEVER, even without taking it apart, I can already tell that the fault on mine is on the 240vac inlet side (2 tests. NB there is a theoretical risk of damaging the capacitors during discharge, although I've never known it to happen. A small 'tick' noise will be heard the first time you discharge, the second time there will be no noise, this being your evidence of a completed discharge ALL OF THE ABOVE IS WRITTEN WITH THE ASSUMPTION THAT YOU HAVE ALREADY DISCONNECTED THE MAINS SUPPLY. DISCHARGING: to make-safe the unit it can be actively be discharged by the deft employment of the end of a sizable flat blade screwdriver, and shorting out the 2 terminals on each of the capcitors. IT HURTS LIKE A B!TCH!! Anyone with heart problems may want to re-evaluate thier decision to work on an undischarged unit. What does it feel like? I can only speak for the 240vac version, and have this to say about it. i.e it exists transiently until the caps discharge. if its th USA model, that slim chance is even slimmer, as the USA uses a girly 120vac as oppose to our manly 240vac in the UK. as yet there have been NO recorded occurences.

2008 MAC PRO POWER SUPPLY REMOVAL IFIX IT HOW TO

Tried to find a schematic, or guide online, nothing much, just how to remove the whole PSU.Р”РЋ: The likelyhood of the belt delivered by the smoothing caps in one of these being fatal. Tried to get a log but before I could it shut off again.

2008 MAC PRO POWER SUPPLY REMOVAL IFIX IT MAC OS

Got it to start up from the 10.11 Mac OS disk once successfully worked fine for a couple of minutes.

Tried to start up from other disks with older OS I had lying around. Tried RAM and GPU in different slots and combinations. At first not rightaway but now it just quits after a few minutes while being stuck on the progress bar in the startup screen. I have a bootscreen if I press Alt at startup. After a forced restart (after 20 minutes) the old problem returns: the machine shuts off, then sits there in with all fans blazing (with power to all components). Machine starts up, finds harddrive quicky, then hangs at 3/4 the progress bar. Not flush with cash either after investing in video equipment and lenses.Р”Р‡inally recieved the 3mm long hex key and paste in the mail last saturday.Р”В¬leaned up the inside, applied new paste for all the chips with cooling (CPU, North Bridge, one other chip).

I really want to save this old beast, it's been a loyal workhorse. here's my question: Could the CPU be overheating without it registering on the temperature meter? (I'm using Mac Fan Control, it's pretty reliable, but I have no idea if the sensor is measuring the cooling element or the cpu itself)Р”В¬ould it be the cooling paste that dried up, and the chip overheating? Sorry no screenshots, I'm typing this on my laptop. The top CPU doesn't get very warm, only 34 degrees. previously it would just boot up fine and then work for another month.Р”В¬ould be the CPUs, Northbridge chip or PSU

It does that under reasonable cpu load, then starts blowing with all fans at maximum. My old machine started switching itself off randomly.Р”Р„t first it was once every few weeks, now it's every 20 minutes.

2008 mac pro power supply removal ifix it