HP Laserjet 4 Plus LED display dim

HP DeskJet Plus

Experienced technical support provide their insights in answering this question :

My HP Laserjet Plus’s LED display went blank around 6 weeks ago. It had been acting strangely for about a month, when ready, instead of the usual 00 READY it would display 000READY, which got my attention. Well, it suddenly went entirely AWOL. The service manual said to check:

How to Identify and Fix Common Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced technical support :

Faint, streaky or spotty prints are all common signs of a clog but a simple cleaning can usually get your HP ink cartridges working again. Printheads clog due to infrequent cartridge use. If you regularly go a few weeks without printing, your cartridges will eventually dry out and need to be replaced.

Click the Paper/Quality tab, and then locate the Quality Settings area. If the entire page is too dark, select the EconoMode setting. If the entire page is too light, make sure you are using the correct setting for the print job. If you a printing photos, select the Photo option.

Printer sleep mode

Check that the printer does not have sleep mode enabled: Go to Control Panel > Devices and Printers. Right-click the printer in question, then select Printer Preferences. Look for an option to disable sleep or time-out mode.

Here are the most common causes of a printer printing faded text or images: Low ink or toner levels. Toner sticking to the fuser roller or problems with the transfer roller. Low ink or toner density settings.

Prints appear too dark.

The main reason this occurs is because the brightness level on the computer monitor is too high. It`s common with newer monitors, many of which are designed for gaming and have their brightness levels set higher by default.

Simply dimming your monitor until it matches the brightness of the print is only a band aid for the dark print problem, but if you`re just an occasional photo dabbler, it might be all you need. If the monitor is dimmer, all your edits will revolve around making a brighter print.

A Black Cartridge is Low or Very Low message displays when the amount of toner in the cartridge is below a certain percentage. This message is a reminder to have a replacement toner cartridge available.

You must press the power button to turn the printer back on.

For healthier print heads and more efficient ink consumption, however, it`s better to leave your printer on. Constantly switching your printer off and on will decrease your printer`s lifespan, so try to keep the off/on to a minimum.

Unfortunately, there is no way to restore faded ink to its original state. Some chemicals are advertised to darken original inks, but they are often damaging to paper and conservators do not recommend them.

In the [Advanced Settings] dialog box, select [List of Settings] [Toner Density] [Adjust] → click [Details]. Adjust the density for each color → click [OK].

You can visually inspect the remaining cartridge levels on your printer. If they are full but you still cannot print properly, check the cartridge`s expiry date. Expired ink cartridges often dry up which causes problems in the print results.

If your HP printer not printing black ink correctly, here`s what you should do. Using non-genuine ink cartridges. Printheads that have become clogged. Ink cartridges that are defective or empty.

If the ink level is sufficient, but the printer still does not print black ink, you may need to run a cleaning cycle. A cleaning cycle is a process that cleans the printer heads and removes any clogged or dried ink.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

HP Laserjet 4 Plus LED display dim

ANSWER : My HP Laserjet Plus’s LED display went blank around 6 weeks ago. It had been acting strangely for about a month, when ready, instead of the usual 00 READY it would display 000READY, which got my attention. Well, it suddenly went entirely AWOL. The service manual said to check:

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HP DeskJet Plus

HP Laserjet 6MP wont feed paper

ANSWER : I had a similar paper pickup problem on laserjet 6mp. The printer would go through start-up sequence fine but when it received a print job you could here the main gears/rollers turning but no clicking from paper pickup solenoid, then eventually error lights would come one . I incorrectly assumed it was an error with the paper pickup mechanism and wasted a whole day taking the printer apart and replacing the paper pick mechanism. Long story short, if I had bothered to figure out the secondary error light codes from the start, I would have realized it was just a bad fuser and would not have wasted so much time.

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HP DeskJet Plus

LaserJet 4 won't Power Up

ANSWER : I haven’t seen that particular behavior on that model. It either works or it doesn’t. My first choice would be the power supply.

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HP DeskJet Plus

evenly spaced horizontal lines on hp laserjet III printout

ANSWER : The lines would be a toner cartridge problem. Which paper tray? The MF tray or the optional paper cassette?

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HP DeskJet Plus

HP Laserjet 4200 50.2 Fuser error

ANSWER : if you are using a good fuser the next part to try would be low voltage power supply