MacOS Interchangeable From 1 PM to Another

I re-ran Rember, this time with one stick of RAM each time. All the RAM passed 'individually'. Wondering if a RAM socket is bad perhaps. Or maybe a combination of 2 RAM sticks somehow became 'uncooperative'.

I ran the ASD last night 1 loop and stop on error. This morning it said 'Test Failed'; test failed error -22; Register Test. I googled many combinations of ASD, error -22 and Register Test and came up with nothing useful. There was nothing in the PDF Test Results Guide.

Sure wish there were a repository for these diagnostics and error codes.

Re-ran the ASD test and found more info. It was running 'Firewire OHCI' when it reported the error.

Ran the rest of the tests and all passed other than the above.

Further review of the 'Test Results Guide' suggests replacement of the logicboard .... 😟. Wondering what the FW has to do with how the system runs and the boot sequence?

Message was edited by: buz

Guess I'm not done with this thread. In the mean time here, the PSU failed and it's repaired now. I am still wrestling with the MDD. The good news is that it starts now and has a reasonable start up time. I didn't want to stress it right away so was only running Temperature Monitor and Safari - and the assorted MDD mods Chud, and NapEnable. As it idled along I was composing a reply to another thread and out of the blue the fans ramped up the temps began rising. I was concerned maybe all the fans weren't working so opened the case and *Blink* it shut down.

Didn't know what to think so let it set a while and it booted right back up, but with the fans ramped. My first effort was to try and boot to Disk Warrior and had various unexpected behaviors from spitting the disk, to shutting down. Finally got booted to DW and just as it was ready to build a new directory it shut down again. Gave up on DW, I was able to get a graph from DW that showed >1% so figured it was ok. Then went to ASD and ran it, fortunately I was watching most of the way through and was passing all the tests, but right at the end the machine shut down again. Haven't restarted it yet so don't know if I got a report or not.

These shut downs aren't complete, the Power button still glows (pulsing) and the red LED on the board is still on. The display goes off, the fans quit, the drive quits but the power stays on. Pressing the Power in this state will power it back up.

The machine is 'stock' and am using only 1 ram chip.

Back to the beginning, when it started to ramp up initially, it had idled along for 20 or 30 mins just as quiet and peaceful as could be - then wham!! it took off and with no apparent extra load. At one point I looked at Activity Monitor and saw nothing unexpected.

Any ideas for me??

No - so I suppose I'll do that next. Happen to have some MX-2 on hand. Been out for a bit and left the MDD running and it is still - so it's gone a cpl hours now. TempMonitor shows current CPU temp at 60º and the max was 72. 60º seems kinda high for an idle.

Is replacing thermal compound an expected maintenance routine every so often?

Well BDAqua I'm not sure where it's going, gonna let her idle for a bit. The good news is that when I shut her down the CPU was idling at nearly 60º and half hour later fired her up with new thermal paste and the CPU started at 38º and is up to 46º. Hoping it levels off soon.

Thinking your tip was in the right direction though - thank you.

Left it run over night and it held steady at 61.4º. Launching Safari alone it spiked to 67.7º and is dropping back some ... 66.4º ... 66.4º. The thermal paste certainly helped. There were a couple times yesterday when 70º+ was hit.

Obviously at this point, this machine can't be asked to do anything more than run Safari (barely).

The machine passed all the ASD tests last night.

I tried checking that yesterday. Opened the case (while booted) and the system *Blinked*, meaning the display, fans, and drive all shut down, but power was still present (Power Button lit but pulsing and red LED on board on). Later tried booting with case open and 'no go'. The PSU fans are working, but correctly? - not sure what correctly is. I held a lighter at the rear of the of the machine to 'see' airflow.

I'll shut down and see if I can get it to boot with the case opened.

This is too strange. It will not boot opened. Second power button press and not even a button glow. Closed - boots right up.

It was shut down fifteen minutes (approx), when it shut down temp was steady around 63 - 64º. 15 min later (case had been opened the whole time) the temp had dropped to ~50º ... maybe that isn't such a big drop (seems like a lot in 15 min).

Here's the strange part .... case closed, booted up, using a lighter again to 'see' air flow from the PSU. There is flow. Wondering about the 120mm fan, I can hear it, but is it the right direction ... I threaded my hand between the various cables and the rear of the case to see if I could feel for air flow and *blink* the 120mm quiets down (seemed to stop) ..... the strangest thing is that while typing this I'm watching Temp Monitor in the background it's leveling off at 58º, 5º cooler. The machine is almost dead quiet.

The 120mm is starting to ramp up again. Gonna post this and try opening the case while booted.

More coming ....

Got it booted opened. Apparently, there's something in the PSU bundle, maybe the main plug to the board. I moved some wires around, rerouted the fan connection, noticed it would *blink* when the case was 95%. Anyway, wrenching the bundle to a new position 'seemed' to do the trick.

Main fan is not running. It's a brand new SilenX 120 Extrema Pro - XP 74-14. I don't know what to do to test whether it's the fan or board. PSU fans and small case fan all running.

The machine is soo quiet, temps dropping 50.6º