3

Something is causing your screen to get signals to display that before your board properly takes it over after 3 seconds. It is an oddly repetitive pattern. If it is software, you should not see it on a stable stock marlin release with minimal customizations to enable the LCD. Usually nothing else shares pins with the LCD, but please do double check pin ...


2

According to the link to the fork of Marlin you need to be sure that a bootloader is present before flashing, see pins_MELZI_WYH.h: /** * Melzi (WYH) pin assignments * * The WYH-128 board needs a bootloader installed before Marlin can be uploaded. * If you don't have a chip programmer you can use a spare Arduino plus a few * electronic components to ...


2

Can you tell if the fans are turning on for your Ender 3? If not then the problem may be with your power supply or main board. If you can hear your power supply is on (listen for the fan near where you plug in the 120/230 V power plug), then the issue may be with either your main board or LCD screen. If this post on reddit is accurate, the Ender 3 uses a ...


2

This is hard to answer, it depends on your skills if you can can repair it or not. As you haven't changed the firmware, it is unlikely that this is a software issue. If the display doesn't light up, the power to the module may be broken. If you have an Arduino Uno or similar you can try to upload a sketch and connect the display to see if it works, there are ...


1

There seems to be an issue with these cheap controllers with the timing. With reference to the next reported issues: https://github.com/MarlinFirmware/Marlin/issues/5703 https://github.com/MarlinFirmware/Marlin/issues/5720 Add these 3 lines after the #define ENDER5_PLUS in the firmware files: #define ST7920_DELAY_1 DELAY_NS(250) #define ST7920_DELAY_2 ...


1

It's almost always what you call system 2: The LCD screen is acting as a "mask" for the UV backlight, which is a strong bulb under it. This also is the reason that the screen degrades over time and that the machines need replacement bulbs: the heat from the UV source burns out the screen and itself over time. Both parts are consumable, just like ...


1

The way you're thinking about using the LCD directly on the bottom of resin vat and cure the resin is a good idea, but there are several problems that I will focus on the main. as mentioned by @Trish some issues might occur to the LCD and u need to replace it. Except that you need to clean the vat some times after print and with LCD attach to it, you know... ...


1

SLA printers have basically 2 expendable parts: The UV light source is only good for so long before it degrades and breaks. The LCD will become blind over time. The vat's lower surface - the build area - will get eaten by the resin over time. Because of this, all commercial SLA printers come with a special film at the vat's bottom surface, a sacrificial ...


1

I know this is a closed and already answered question, but for anybody having an Alfawise EX8 and wanting to update the firmware, I've changed some things in the Marlin bugfix-1.1.x version, so that it now works perfectly with this printer. You can find it here. The issue with the display is in the file ultralcd_st7565_u8glib_VIKI.h. The Alfawise EX8 version ...


1

If what Thomas Sanladerer states is correct, the Mars 2 Pro (monochrome LCD, no color filter) has a layer time approximately 1/3 as long as the Mars/Pro printers (where color LCDs are used): This would indicate that the light passing through the LCD, when the color filter is present, is 1/3. Put it in other words, only ONE ...


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