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During the initialization printer moves the gantry a little bit. Is this movement visible? Can you move the gantry using the command from the SDS menu? If you switch off the printer completely, then move the gantry somewhere from the home position, will it return to the home during the...

You need to check everything related to the gantry movement. First question - when you restart the machine, the initialization is correct? Do you have any errors during this process? Does the gantry move during the initialization?

It won't happen.

That's a really old version, I don't want to say it's useless, but for sure it's obsolete in many topics.

Swap this M head with another one from the same channel, you'll see if it's a problem with the head (if the problem moves together with the head) or somewhere above - flat cable, board etc.

Ink pumps are located in the box located in the middle of the printer (near the main ink filters' box), at the bottom part.

When did you replace the white ink filter (capsule) for the last time? Can you hear the white ink pump? When did you replace the white filters in the carriage (small discs)? Do you see a black powder around the ink pumps?

Check items from the list on the picture: - is it possible to move the carriage and gantry manually? What are the readings on the carriage and gantry encoder read heads (colour of the LED - green/yellow/red) - is the drawer closed (and the sensor is working)? - are all the buttons released? -...

Take a quick look into the carriage and check, if these missing nozzles are near the ink inlet of the head. If so, it's possible that the ink flowing into the head sediment on the nozzle plate inside creates such blocks of missing nozzles. Try to clean the nozzle plate with pure IPA, maybe it...

It's all about the ICC profiles. If it's wrong (or someone choose the wrong profile, not for the specific substrate), colours may be different than they should. Ask the supplier, why red is washed out.

So tell the vendor that he should prepare the head and give you the warranty. I don't think such a head will provide the same quality as the original CA4.

If it's CA3, it should be okay regardless of the additional description. Just be sure that the ink inlet is the same.

Was the cyan ink pumped into the heads? In theory, the printer's firmware should inform you that there's a wrong pouch connected to the socket. If the whole channel (tubing, heads, ink filter, recirculation tubing, pump) has the cyan inside, a long flush procedure would be the best solution, but...

When you have the flush kit, you connect it instead of the ink pouch to the connector. The other end of the tube you put in the flush canister and you start the flushing procedure (if it is in the firmware of the printer) or you start the procedure 'Ink system liquid flush' from the SDS menu...

If the inks were not removed for storage, you will probably have to replace the ink filters and then check, how the ink system works. Also check BEFORE you move the printer, if the carriage and gantry are secured (gantry to the table, carriage to the gantry). The worst case is that some heads...

In theory, the reading should be exact, but usually it's not. I wouldn't rely on this part of the software, it's faster to take a quick look at the bags.

Did you measure the meniscus vacuum using the external gauge? Did you replace the small filters inside the carriage, in the vacuum tubing?

White ink pumps are always the most tired due to the ink weight. Look around the pumps, maybe there's a black powder around (if it's there, the brushes are approaching the end of their lifetime. Newer machines have brushless pumps, I'm not sure which version you have. Did you replace the main...

If you see this problem two weeks after the head replacement, maybe you need to consider the ink system flushing to remove sediments from tubes, pumps and so on. And an important question - when did you replace the ink filters for the last time?

Take a quick look inside the carriage and compare the position of the missing nozzles with the ink connection tube at the top of the head. Older versions of Arizona had a similar problem on the white channels - ink flows into the head and leaves some sediment on the internal side of the nozzle...