42S display lense fixer upper?

[Matt Agajanian]

Hi all.

Either it's dust, dot-size chips, under glass dust, but what do you recommend for fixing these? Are there folks here that specialise in taking care of these touch-ups or glass lense replacement?

Thanks.

[rprosperi]

(07-08-2017 06:53 PM)Matt Agajanian Wrote:  Hi all.

Either it's dust, dot-size chips, under glass dust, but what do you recommend for fixing these? Are there folks here that specialise in taking care of these touch-ups or glass lense replacement?

Thanks.

Try the simplest solution first. Get a "Can of Air" at Staples, Best-Buy, Wal-Mart, etc. in the electronics aisle. Simply remove the battery cover and, using the provided small tube, blow air into crevices in the back from various different angles. In many cases, problem solved in 2 seconds, but in others, it makes no difference at all. There are several different LCD module designs for the Pioneer family and it seems they have varying types of seals. Worst case is you've spent about $4 and now have a can of air for cleaning other products too. Good luck and please report success (or not).

[Matt Agajanian]

Never would've thought that the battery compartment as a secret entrance. Ingenious!

Just to be clear, which openings--the four circular holes or the two vertical left/right slots?

Thanks!

[Matt Agajanian]

Upon further inspection (and in better lighting), the speck in my brother's eye (yeah, the 42's display lense) seems to be a salt/sugar granual-sized chip.

And, considering this is an auction win, who knows what kind of childhood this 42S has endured.

So, the glory and ectstacy of RPN and HP-41 programming live on (a little scuffed up, but living).

[rprosperi]

(07-08-2017 08:06 PM)Matt Agajanian Wrote:  Just to be clear, which openings--the four circular holes or the two vertical left/right slots?

(07-08-2017 08:35 PM)Matt Agajanian Wrote:  Upon further inspection (and in better lighting), the speck in my brother's eye (yeah, the 42's display lense) seems to be a salt/sugar granual-sized chip.

To answer the first question (for folks reading this thread later), you should try directing air into:

• Vertical slot son either side
  

• Around the LED bulb
  

• Remove batteries and into slots on sides
  

• Into slot just inside case back, below the battery well
  

In short, any and every crack you can.

For the chipped screen, you can try to polish the plastic lens with a product like Displex, or Katie has recommended Novus Polish kit. As always with chemicals like this, always try them on some test surface first, so you know what if feels like, how it behaves, etc.

[Matt Agajanian]

Thanks for quite an extensive and detailed list. It helps to eliminate and and all ambiguity.

[Dave Shaffer]

(07-08-2017 07:39 PM)rprosperi Wrote:  Worst case is you've spent about $4 and now have a can of air for cleaning other products too.

Be a little careful where you use that "air." It may well have some (oily) impurities - DO NOT USE IT, for instance, to clean the sensor in a digital camera.

[Matt Agajanian]

(07-09-2017 02:07 AM)Dave Shaffer Wrote:  Be a little careful where you use that "air." It may well have some (oily) impurities - DO NOT USE IT, for instance, to clean the sensor in a digital camera.

To avoid that mishap, how do I check if the contents have impurities?

Thanks.

[rprosperi]

(07-14-2017 12:57 AM)Matt Agajanian Wrote:  

(07-09-2017 02:07 AM)Dave Shaffer Wrote:  Be a little careful where you use that "air." It may well have some (oily) impurities - DO NOT USE IT, for instance, to clean the sensor in a digital camera.

To avoid that mishap, how do I check if the contents have impurities?

Thanks.

First check is to read the label, it should say if there are any contents such as oils.

Then spray it onto a handy glass (or even better mirror) surface which you have ensured is completely clean just before you spray it. If there are oils present, you will see them on the glass surface, though suggest you check it closely (e.g. with flashlight and magnifying glass - but this depends on your eyesight).

If you suspect there could be some kind of residue (such as oil, etc.) on the glass but aren't sure, run your finger across the surface where you sprayed; if there is something, you will see the trail.

In the original question, I never answered completely - don't bother to spray air into the 4 rounds holes; they are raised stakes to hold on the back, and I don't believe the path passes into the front of the chassis where the LCD is.

[Matt Agajanian]

Bob, I appreciate your detailed explanation. Thanks!