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Scraped an op amp from logic board accidentally

Raunien said:
Ah okay, sounds more complicated than I anticipated. I will probably just deal with the new serial number.
Click to expand...
I just need a dump from the original backplane and the new one, plus a picture of the MLB/LBSN label and the ESN label of the case.

Another thing, you have to do a new macOS install with an empty disk without iCloud/Messages/FaceTime, so the replacement board never connects to iCloud/Messages/FaceTime servers before the new BootROM is flashed. Just disconnecting from iCloud/Messages/FaceTime is not enough. Doing this way you won have to contact Apple for anything and will just work.
 
tsialex said:
I just need a dump from the original backplane and the new one, plus a picture of the MLB/LBSN label and the ESN label of the case.

Another thing, you have to do a new macOS install with an empty disk without iCloud/Messages/FaceTime, so the replacement board never connects to iCloud/Messages/FaceTime servers before the new BootROM is flashed. Just disconnecting from iCloud/Messages/FaceTime is not enough. Doing this way you won have to contact Apple for anything and will just work.
Click to expand...

Can I PM you?
 
spidertnt said:
I have repaired a few of these pretty common problem ...customers installing video-cards requiring dual power .

They try to remove power connector...when it releases it travels along the board surface knocking off one of those IC chips.
Click to expand...
I've definitely had it travel and hit the IC chips, will be checking them when I get home! Never imagined they might just pop off so easily.
 
When I bought my 4,1 used the same chip was missing but I didn't notice until a year or so. Everything I tried always worked except for the front FireWire ports. YMMV.
 
This is the error that Apple Hardware Test detected this morning when I ran the extended test. Looks like it's some sort of temperature sensor.
 

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Raunien said:
This is the error that Apple Hardware Test detected this morning when I ran the extended test. Looks like it's some sort of temperature sensor.
Click to expand...
V = voltage
e = PCIe
A = Boost A
S = ?

If I had to bet, VeAS = voltage sensor from PCIe AUX A.
[doublepost=1557512873][/doublepost]
bsbeamer said:
Does this possibly mean Voltage / PCIe / Ambient Air Sensor?
Click to expand...
No, that TI INA219 don't have temperature sensors, just voltage/current. It's an I2C/SMBUS IC for monitoring voltage and current.
 
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tsialex said:
V = voltage
e = PCIe
A = Boost A
S = ?

If I had to bet, VeAS = voltage sensor from PCIe AUX A.
Click to expand...

That's correct, PCIe Aux A is currently reading 0.00 v from istat menus (had to reset the filtering to see it)
 
Using a GT120 to run the AHT. Prior to that, it was a GT740 (only requiring 1 6-pin connector - got it from Aux B). Haven't tried anything that requires power from Aux A.
 
Last edited:
Do you use or need GPU power AUX A?

Does it still output power, even with broken voltage sensor? I bet it does. All 12V power comes from one rail. That one sensor is a bit redundant, since the other one (AUX B) less than an inch away is measuring the same thing. If your PSU were to go out of tolerance, every other 12v sensor in the system would also detect it and shut down.

Most practical answer may be close up the side panel and don't bother replacing the backplane. Replacing that requires disassembling the whole Mac. You've then got the whole mismatched serial number issue.

You have to hope that the seller is sending you the correct 4,1 or 5,1 backplane and that the replacement isn't iCloud locked. Also hope that the new backplane is actually properly functional. You won't know until you do the entire swap and turn it on.
 
Slash-2CPU said:
Do you use or need GPU power AUX A?

Does it still output power, even with broken voltage sensor? I bet it does. All 12V power comes from one rail. That one sensor is a bit redundant, since the other one (AUX B) less than an inch away is measuring the same thing. If your PSU were to go out of tolerance, every other 12v sensor in the system would also detect it and shut down.

Most practical answer may be close up the side panel and don't bother replacing the backplane. Replacing that requires disassembling the whole Mac. You've then got the whole mismatched serial number issue.

You have to hope that the seller is sending you the correct 4,1 or 5,1 backplane and that the replacement isn't iCloud locked. Also hope that the new backplane is actually properly functional. You won't know until you do the entire swap and turn it on.
Click to expand...

All good points. Unfortunately, replacement board was already ordered and arriving tomorrow. We'll see.
 
I'd stick the old backplane in the attic or back of the office closet (or in the box I have that my 4,1 came in) as long as I own the Mac.
 
Slash-2CPU said:
Do you use or need GPU power AUX A?

Does it still output power, even with broken voltage sensor? I bet it does. All 12V power comes from one rail. That one sensor is a bit redundant, since the other one (AUX B) less than an inch away is measuring the same thing. If your PSU were to go out of tolerance, every other 12v sensor in the system would also detect it and shut down.

Most practical answer may be close up the side panel and don't bother replacing the backplane. Replacing that requires disassembling the whole Mac. You've then got the whole mismatched serial number issue.

You have to hope that the seller is sending you the correct 4,1 or 5,1 backplane and that the replacement isn't iCloud locked. Also hope that the new backplane is actually properly functional. You won't know until you do the entire swap and turn it on.
Click to expand...

Mac Pros before the MP6,1 don't work with iCloud lock and even the Firmware Password lock is easily bypass-able, just changing the RAM, unfortunately.
 
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tsialex said:
Mac Pros before the MP6,1 don't work with iCloud lock and even the Firmware Password lock is easily bypass-able, just changing the RAM, unfortunately.
Click to expand...

Sorry. Meant the serial number iCloud/Messages/FaceTime block if previous owner messed with BootROM/serial number. Used wrong term not thinking about iCloud lock like iPhones have, which is different altogether.
 
I have the same problem... does anyone knows if the PCIe Aux A is still delivering any power?
If so, is it safe to be using it?
 
xch said:
I have the same problem... does anyone knows if the PCIe Aux A is still delivering any power?
If so, is it safe to be using it?
Click to expand...
Yea it still delivers power and works.

It’s just a voltage sensor so it won’t report it on istat menus (or similar software)
 
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