# Frequently Asked Questions

**URL:** https://marlin.crc.id.au/forum/c/frequently-asked-questions/9.md

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## [Ender 3 V2 - Frequently Asked Questions](https://marlin.crc.id.au/forum/t/ender-3-v2-frequently-asked-questions/17)

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**Author:** [@CRCinAU](https://marlin.crc.id.au/forum/u/CRCinAU)\
**Replies:** 0\
**Last updated:** [27 June 2021 13:01 UTC](https://marlin.crc.id.au/forum/t/ender-3-v2-frequently-asked-questions/17 "2021-06-27T13:01:51Z")

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Table of Contents: Which firmware do I need for my printer? Flashing Firmware Recovering from a black screen after firmware update Help! My screen shows a picture of clouds! My screen is in Chinese, how do I switch it b…

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## [Improved Start G-code for printers (Cura and PrusaSlicer)](https://marlin.crc.id.au/forum/t/improved-start-g-code-for-printers-cura-and-prusaslicer/55)

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**Author:** [@CRCinAU](https://marlin.crc.id.au/forum/u/CRCinAU)\
**Replies:** 0\
**Last updated:** [17 July 2021 08:35 UTC](https://marlin.crc.id.au/forum/t/improved-start-g-code-for-printers-cura-and-prusaslicer/55 "2021-07-17T08:35:04Z")

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I use this Start G-code for my Ender 3 with PrusaSlicer. A translation for Cura is below. PrusaSlicer - Start G-code: G90 ; use absolute coordinates M83 ; extruder relative mode M104 S{first\_layer\_temperature\[0\] \* 0.8}…

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## [Identifying Ender 3 V2 screen versions](https://marlin.crc.id.au/forum/t/identifying-ender-3-v2-screen-versions/960)

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**Author:** [@CRCinAU](https://marlin.crc.id.au/forum/u/CRCinAU)\
**Replies:** 0\
**Last updated:** [9 June 2022 09:17 UTC](https://marlin.crc.id.au/forum/t/identifying-ender-3-v2-screen-versions/960 "2022-06-09T09:17:57Z")

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Creality have begun shipping out multiple different screens with Ender 3 V2 printers - and as we see more of them appear in the wild, we are finding minor problems with rendering and different behaviour to different revi…

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## [BLTouch - Frequently Asked Questions](https://marlin.crc.id.au/forum/t/bltouch-frequently-asked-questions/19)

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**Author:** [@CRCinAU](https://marlin.crc.id.au/forum/u/CRCinAU)\
**Replies:** 0\
**Last updated:** [27 June 2021 14:29 UTC](https://marlin.crc.id.au/forum/t/bltouch-frequently-asked-questions/19 "2021-06-27T14:29:37Z")

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The basic: The BLTouch has two parts from a firmware perspective. a) Control, often called servo. This consists of 3 wires: Red is +5v Yellow is signal and; either a Brown or Black is GND. The control signal is PWM …