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shake cartridges before we begin an engineering project

air bubbles in line? it couldn't hurt to take a syringe and pull some ink through the appropriate (missing) color(s) since it started out printing ok

jburton have you ever been in witness protection?

so would i

you have me curious now. i will have to watch a couple videos i was fixing printers since the techjet 720 and the hp laserjet 1's

unless you flush THOROUGHLY you will be turning the printer into garbage. (or at least guaranteeing you need new heads WHY NOT configure remote access & send a color wheel every other day. i really didn't print anything but daily color wheels on my printers after the wife ended up in hospital...

on these boards, don't you have to match firmware? that can be torture

yes, the fact that the green led lights does not mean it is a good board.

probably the way to go. i would trust your assessment. i have bought many bad boards on ebay, especially ones that are not easy to test

i realize this is not a good place for you to order, but, gives you an idea of what the price is less than the price of 2 ink cartridges...

My best suggestion would be, if nothing lights, buy a replacement power supply. even those of us who are qualified tondo that type of repair rarely have success. the service manual ASSUMES troubleshooting end with replacement of a circuit board. hp has the circuit drawings for board level repair...

I will have time later to review the manual a bit, but, this will not be a change the fuse situation. my guess would be you wil” end up replacing the power supply. before you do, it would be worth taking the power supply out of the machine &removing the covers. you will most likely find the...

It appears there are 2 sets of status lights that indicate the condition of power supply and the state of system board. Should get you pretty far into the process

you could try shaking them once in a while

https://www.laserexpressinc.com/manuals/HP/hp-dsj-t790-t1300-z5400-t2300-service-manual.pdf

i guess that's why the typical service manual is 500 pages long... i just printed the manual for my designjet (t1700dr) 550 pages

shouldn't you simply google & watch a couple youtube videos? when i bought my big cnc a few years ago, i watched a 90 minute video and went step by step & made a square and a circle and routed them, and took out a tape measure and adjusted so the size was correct... this is what everyone has to do

re you talking about nesting? (arranging your prints with a minimum or white space between them when the choice is complicated by having your substrate available in different widths)?

i was just gonna say one of those "test pens" is a great idea with my luck, i would do the job just at the time the timer for the lighting kicks in. we had an electrician friend years ago who got zapped in the basement of a fish market in newark he survived but the helper said he twitched and...

i got my bucket truck the same way as my printers in "manufacturer says it can't be fixed" condition from an electrician in parsippany paid $2200 & killed the better part of 4 sundays getting it in working condition. (i am notoriously cheap, but fairly good at troubleshooting) i only use it...