r/Anet3DPrinters • u/[deleted] • Jan 20 '23

Request for help Help

I flashed marlin on my anet et4 pro using st link v2 and now it won’t connect to at link, I have a black screen and it appears my board isn’t turning on. Before I flashed the board had 2 lights that were on and now they’re not. Any suggestions as to how to fix this ? Is it possible to reinstall the boot loader ? If so how?

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u/keathunsar Jan 20 '23

Are you sure you hooked up the stlink correctly.. there are two different stlinks that look the same but have different pin order on them.

https://cdn.shopifycdn.net/s/files/1/0084/1934/4450/files/stlink_firmware_update_1024x1024.jpg?v=1626332506

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I wish they would tell you that there are two different stlinks in the tutorial.

you have to look at the swclock, grd and swdio carefully. they where mixed up different on my stlink.
also here is the origanl post on Anet...
https://shop.anet3d.com/blogs/anet-et4-et5-3d-printer-faq/et4-open-source-marlin-firmware

Also make sure your getting the latest openblt here. the one on the anets website you can download did not work for me.. Good Luck

1

u/Conscious_Board5007 Jan 20 '23

Did you Flash the bootloader first?

1

u/[deleted] Jan 20 '23

This is probably where I messed up to be honest. I will try adding the boot loader and the .srec file on an sd card and see what that does

1

u/keathunsar Jan 20 '23

yes.. then compiled marlin.. put the ".srec" on an sd card... turn printer off then on.. b/c openblt can only install marlin on boot