Explanation
Telnet is an unsecure remote access protocol that allows a user to connect to a remote device and execute commands on it12. Telnet does not encrypt the data that is transmitted between the user and the device, which means that anyone who intercepts the network traffic can read the information, including usernames and passwords12. Telnet also does not authenticate the user or the device, which means that anyone can impersonate either party and gain unauthorized access

Verifying the correct type of paper is loaded is the best solution for resolving the issue of blank receipts being printed by a point-of-sale printer. Some receipt printers require a specific type of paper, and using the wrong type can result in blank receipts. Reference: https://www.techwalla.com/articles/what-are-the-causes-of-blank-receipts-from-a-printer Top of Form Verify the correct type of paper is loaded. If a point-of-sale printer is printing blank receipts, one possible cause could be that the wrong type of paper is loaded in the printer. Thermal printers require thermal paper to print properly. If regular paper is loaded instead of thermal paper, the printer will not be able to produce an image on the paper and will print blank receipts.

Three beeps indicate a "base memory read/write test error". Check out "beep codes" for more information.
https://en.wikipedia.org/wiki/Power-on_self-test#POST_beep_codes_on_CompTIA_A.2B_certification_exam Reseating the RAM is the best course of action to remediate the issue of three consecutive beeps during boot, as it may indicate a RAM failure or loose connection. By reseating the RAM, the technician can ensure that the connection is secure and the computer should boot normally. Reference: CompTIA A+ Certification Exam Objectives 1001, 1.9

The most likely cause of the issue is C. Physical cabling issues.
Physical cabling issues can affect the quality and stability of the display signal. If the cable is loose, damaged, or bent, it may cause intermittent connection, interference, or signal loss. This can result in slow, distorted, discolored, or blank display.
To troubleshoot physical cabling issues, the user should check the following steps:
*Make sure the cable is firmly connected to both the display and the video adapter.
*Inspect the cable for any signs of damage, such as cuts, frays, kinks, or exposed wires.
*Check the cable connectors for any bent or broken pins.
*Try a different cable or a different port on the display or the video adapter.
*If possible, test the display with another device or test another display with the same device.
The other options are less likely to cause the issue, because:
*Incorrect data source may result in no display or an error message, but not slow or distorted display.
*Incorrect resolution settings may cause stretched, blurry, or cropped display, but not discolored or blank display.
*Incorrect refresh rate may cause flickering or tearing display, but not slow or distorted display.
*Display burn-in may cause permanent image retention or ghosting on the display, but not intermittent or blank display.
For more information and tips on how to fix common display problems, you can visit these links:
*How to Troubleshoot Display or Video Issues on a Dell Monitor
*Display Troubleshooting - iFixit
*How to Fix the Most Common Problems With LCD Monitors