Scraped an op amp from logic board accidentally

[tsialex]

Ah okay, sounds more complicated than I anticipated. I will probably just deal with the new serial number.

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.

 

[Raunien]

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.

Can I PM you?

 

[tsialex]

Can I PM you?

Just use the same PM thread as before.

 

[Squuiid]

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.

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.

 

[saulinpa]

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.

 

[Raunien]

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.

 

[bsbeamer]

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.

Does this possibly mean Voltage / PCIe / Ambient Air Sensor?

 

[tsialex]

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.

V = voltage
e = PCIe
A = Boost A
S = ?

If I had to bet, VeAS = voltage sensor from PCIe AUX A.
[doublepost=1557512873][/doublepost]

Does this possibly mean Voltage / PCIe / Ambient Air Sensor?

No, that TI INA219 don't have temperature sensors, just voltage/current. It's an I2C/SMBUS IC for monitoring voltage and current.

 

[Raunien]

V = voltage
e = PCIe
A = Boost A
S = ?

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

That's correct, PCIe Aux A is currently reading 0.00 v from istat menus (had to reset the filtering to see it)

 

[bsbeamer]

What GPU are you using currently?

 

[Raunien]

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.

 

[Slash-2CPU]

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.

 

[Raunien]

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.

All good points. Unfortunately, replacement board was already ordered and arriving tomorrow. We'll see.

 

[Slash-2CPU]

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.

 

[tsialex]

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.

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.

 

[spidertnt]

All good points. Unfortunately, replacement board was already ordered and arriving tomorrow. We'll see.

My Ebay replacement board had one of those knocked off also....

 

[Slash-2CPU]

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.

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.

 

[Raunien]

Replacement board works well. AHT passed with no errors.

 

[xch]

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?

 

[Raunien]

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?

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)