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HP 15C Issue with screen refresh
04-02-2021, 10:45 AM (This post was last modified: 04-02-2021 10:57 AM by jhlee0218.)
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HP 15C Issue with screen refresh
Hi All,

This is my second post. Smile
So, I recently acquired two voyagers (11C and 15C). While they are both in a good condition cosmetically, both of them are exhibiting this problem that I did not notice with my other voyager models (another 15C and 12C).

What happens is when the contents of the display change, sometimes there is a noticeable lag with some segments of the display.
For instance, if I have 1234567890 on the stack, and press CLEAR (<-) key, it does not display 0.000000000 immediately, but there is some delay and it appears as if some residue of the previous entry appears briefly.
Another instance this can be easily observed is when I am navigating through the program steps.

I recorded a video using slo-mo mode of my phone. Here is the link:

Do you have any experience with this symptom and what might be causing it (and how to improve it)?

I thought it may be caused by the calculator not being used for so long. I wrote a program that repeatedly shows different numbers and ran it for a few hours, but it did not do anything.
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HP 15C Issue with screen refresh - jhlee0218 - 04-02-2021 10:45 AM

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