So have the segments on the VLM changed? Are any showing that were not showing before? Each segment is produced by a single nozzle, if all the cleaning isn’t changing anything, then you may have a bad damper (allowing air in), or worse a head. A bad damper usually exhibits loss of all nozzles, sometimes all at once. The damper is designed to let air escape from the feed line to prevent a bubble from getting through to the nozzles, if it isn’t working right then it allows air in, so ink doesn’t get to the head.
The one thing you might try is moistening the area inside the capping station with some distilled water, and then shut the machine down for 24 hours which will seal the head in the capping station.This will often will soften stubborn ink so a clean will free it up. When starting it do a power clean followed by printing a cleaning page, See if this changes any thing in VLM with the nozzle check.
If any nozzles that previously weren’t showing up do show up, this indicates the head is probably OK.
I own a 4900, and had a stubborn clogged nozzle in VLM. Tried all the usual stuff , distilled water, windex (like), iso-propyl alcohol. What eventually helped was to moisten the cap-station for the bank that has the vlm with distilled water mixed with isopropylalcohol, or even better with the Epson cleaning fluid from the cleaning cartridge (original Epson part). That fluid appears to be the base fluid of the ink, so without the pigment. As it does not dry quickly it moistens the head and keeps it moistened.
Leave it rest for 1 or 2 days, then just print a testimage (A4 of aslammllest strip from a 17" roll, with the color that has a lot of vlm. I use the cleaning image of Wayne and then crop to that part with the most stripes of clogged nozzles. I printed a few times, then let it rest again for 1-2 days. And so on. You can also increase the ink density to +50%, but be careful, ink can literally drip of your print. I did use this alternatevily with CD set to 0.
Took in my case several weeks.
