2 laser printers have sat unused for about 1 & 2 years. Both printed flawlessly. On re-use they both have abysmal & unusable print quality, the contrast is shot with grey patches all over the place. Is this normal in this time frame? Or must it be due to chemical exposure?


NT

On Wednesday, 14 February 2018 20:40:39 UTC, wrote:
2 laser printers have sat unused for about 1 & 2 years. Both printed flawlessly. On re-use they both have abysmal & unusable print quality, the contrast is shot with grey patches all over the place. Is this normal in this time frame? Or must it be due to chemical exposure?


NT

They're old HPs.


NT

brought next idea :
2 laser printers have sat unused for about 1 & 2 years. Both printed
flawlessly. On re-use they both have abysmal & unusable print quality, the
contrast is shot with grey patches all over the place. Is this normal in this
time frame? Or must it be due to chemical exposure?

Not normal. My HP 4000, with all the add-ons, has sat more or less
unused for 10 years. It gets fired up maybe every few months, to print
an occasional page and the output is always flawless. What does
deteriorate over many years, is paper handling rubber rollers.

On Wednesday, 14 February 2018 21:36:29 UTC, Harry Bloomfield wrote:
tabbypurr brought next idea :

2 laser printers have sat unused for about 1 & 2 years. Both printed
flawlessly. On re-use they both have abysmal & unusable print quality, the
contrast is shot with grey patches all over the place. Is this normal in this
time frame? Or must it be due to chemical exposure?

Not normal. My HP 4000, with all the add-ons, has sat more or less
unused for 10 years. It gets fired up maybe every few months, to print
an occasional page and the output is always flawless. What does
deteriorate over many years, is paper handling rubber rollers.

that's what I thought. Thanks.


NT

On 14/02/2018 20:41, wrote:
On Wednesday, 14 February 2018 20:40:39 UTC, wrote:
2 laser printers have sat unused for about 1& 2 years. Both printed flawlessly. On re-use they both have abysmal& unusable print quality, the contrast is shot with grey patches all over the place. Is this normal in this time frame? Or must it be due to chemical exposure?


NT

They're old HPs.


NT

Where did they sit during the period of unuse? Did they experience any
extremes of temperature?

Have you removed the toner cartridges and given them a good shake to
re-distribute the toner?
--
Cheers,
Roger
____________
Please reply to Newsgroup. Whilst email address is valid, it is seldom
checked.

On 14/02/2018 20:40, wrote:
2 laser printers have sat unused for about 1 & 2 years. Both printed flawlessly. On re-use they both have abysmal & unusable print quality, the contrast is shot with grey patches all over the place. Is this normal in this time frame? Or must it be due to chemical exposure?


NT

We have an old Samsung monochrome laser printer that was retired when we
bought a networked, colour, laser printer. For a few years it was stored
in the shed, but when it was next used, the prints were awful, with
patches and streaks. Nothing we tried improved it, except replacing the
toner cartridge (and integral drum). It has printed perfectly for the
last 18 months and our eldest son uses it to avoid coming down stairs
for every printout.

SteveW

On 14/02/2018 21:40, wrote:
On Wednesday, 14 February 2018 21:36:29 UTC, Harry Bloomfield wrote:
tabbypurr brought next idea :

2 laser printers have sat unused for about 1 & 2 years. Both printed
flawlessly. On re-use they both have abysmal & unusable print quality, the
contrast is shot with grey patches all over the place. Is this normal in this
time frame? Or must it be due to chemical exposure?

Not normal. My HP 4000, with all the add-ons, has sat more or less
unused for 10 years. It gets fired up maybe every few months, to print
an occasional page and the output is always flawless. What does
deteriorate over many years, is paper handling rubber rollers.

that's what I thought. Thanks.


NT

There might be condensation which needs drying out. Also possibly dust
on the window through which the laser shines. The toner cartridge might
need a good shake.
--
Dave W

On Wednesday, 14 February 2018 22:22:53 UTC, Roger Mills wrote:
On 14/02/2018 20:41, tabbypurr wrote:
On Wednesday, 14 February 2018 20:40:39 UTC, tabby wrote:

2 laser printers have sat unused for about 1& 2 years. Both printed flawlessly. On re-use they both have abysmal& unusable print quality, the contrast is shot with grey patches all over the place. Is this normal in this time frame? Or must it be due to chemical exposure?


NT

They're old HPs.


NT

Where did they sit during the period of unuse? Did they experience any
extremes of temperature?

Have you removed the toner cartridges and given them a good shake to
re-distribute the toner?

Temperature kept within 18-28C. No excessive damp or dust. Ammonia has been used in their vicinity, I suspect this is the culprit.


NT

On Wednesday, 14 February 2018 23:24:42 UTC, Dave W wrote:
On 14/02/2018 21:40, tabbypurr wrote:
On Wednesday, 14 February 2018 21:36:29 UTC, Harry Bloomfield wrote:
tabbypurr brought next idea :

2 laser printers have sat unused for about 1 & 2 years. Both printed
flawlessly. On re-use they both have abysmal & unusable print quality, the
contrast is shot with grey patches all over the place. Is this normal in this
time frame? Or must it be due to chemical exposure?

Not normal. My HP 4000, with all the add-ons, has sat more or less
unused for 10 years. It gets fired up maybe every few months, to print
an occasional page and the output is always flawless. What does
deteriorate over many years, is paper handling rubber rollers.

that's what I thought. Thanks.


NT

There might be condensation which needs drying out. Also possibly dust
on the window through which the laser shines. The toner cartridge might
need a good shake.

RH is under 40% so it's not damp. I'll try shaking the cart up. thanks.


NT

On 14/02/18 20:40, wrote:
2 laser printers have sat unused for about 1 & 2 years. Both printed flawlessly. On re-use they both have abysmal & unusable print quality, the contrast is shot with grey patches all over the place. Is this normal in this time frame? Or must it be due to chemical exposure?


NT

sounds like contaminated drums



--
"I am inclined to tell the truth and dislike people who lie consistently.
This makes me unfit for the company of people of a Left persuasion, and
all women"

Well several things really. Where have they been stored. What is the state
of the toner, could damp have got in? The drum is often part of the toner
cart so try a new one. The corona wires can and do get corroded as well and
of course the high voltage generator could have been compromised by damp or
merely by deterioration of capacitors in the power supply.

Brian

--
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This newsgroup posting comes to you directly from...
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Blind user, so no pictures please!
wrote in message
...
2 laser printers have sat unused for about 1 & 2 years. Both printed
flawlessly. On re-use they both have abysmal & unusable print quality, the
contrast is shot with grey patches all over the place. Is this normal in
this time frame? Or must it be due to chemical exposure?


NT

WEll, not so sure about amonia, since its hard to tell the concentration but
if the aer was breathable by us, I'm think its unlikely to be the cause.
Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
wrote in message
...
On Wednesday, 14 February 2018 22:22:53 UTC, Roger Mills wrote:
On 14/02/2018 20:41, tabbypurr wrote:
On Wednesday, 14 February 2018 20:40:39 UTC, tabby wrote:

2 laser printers have sat unused for about 1& 2 years. Both printed
flawlessly. On re-use they both have abysmal& unusable print quality,
the contrast is shot with grey patches all over the place. Is this
normal in this time frame? Or must it be due to chemical exposure?


NT

They're old HPs.


NT

Where did they sit during the period of unuse? Did they experience any
extremes of temperature?

Have you removed the toner cartridges and given them a good shake to
re-distribute the toner?

Temperature kept within 18-28C. No excessive damp or dust. Ammonia has been
used in their vicinity, I suspect this is the culprit.


NT

On 15/02/2018 07:33, Brian Gaff wrote:
Well several things really. Where have they been stored. What is the state
of the toner, could damp have got in? The drum is often part of the toner
cart so try a new one. The corona wires can and do get corroded as well and
of course the high voltage generator could have been compromised by damp or
merely by deterioration of capacitors in the power supply.

Brian


Since nobody has mentioned it yet, have you put new paper in? I have
taken an HP laserjet out of the cupboard after 5 years and had it print
flawlessly, so something has deteriorated in your case. Most likely is
the paper.

Give it a good clean. Failing that, try a new toner cartridge.

On 15/02/2018 07:33, Brian Gaff wrote:
Well several things really. Where have they been stored. What is the state
of the toner, could damp have got in? The drum is often part of the toner
cart so try a new one. The corona wires can and do get corroded as well and
of course the high voltage generator could have been compromised by damp or
merely by deterioration of capacitors in the power supply.

Brian


Since nobody has mentioned it yet, have you put new paper in? I have
taken an HP laserjet out of the cupboard after 5 years and had it print
flawlessly, so something has deteriorated in your case. Most likely is
the paper.


Really? That used to happen with thermal fax rolls, but laser and
inkjet printers will pretty much work with any old paper.


--

Graham.
%Profound_observation%

On 15/02/18 14:10, Graham. wrote:
On 15/02/2018 07:33, Brian Gaff wrote:
Well several things really. Where have they been stored. What is the state
of the toner, could damp have got in? The drum is often part of the toner
cart so try a new one. The corona wires can and do get corroded as well and
of course the high voltage generator could have been compromised by damp or
merely by deterioration of capacitors in the power supply.

Brian


Since nobody has mentioned it yet, have you put new paper in? I have
taken an HP laserjet out of the cupboard after 5 years and had it print
flawlessly, so something has deteriorated in your case. Most likely is
the paper.


Really? That used to happen with thermal fax rolls, but laser and
inkjet printers will pretty much work with any old paper.


99% certain the drum is damaged. Try cleaning with alcohol, but expect
to replace it.


But with HP that's upgraded with new toner.



--
Future generations will wonder in bemused amazement that the early
twenty-first centurys developed world went into hysterical panic over a
globally average temperature increase of a few tenths of a degree, and,
on the basis of gross exaggerations of highly uncertain computer
projections combined into implausible chains of inference, proceeded to
contemplate a rollback of the industrial age.

Richard Lindzen