# SOVOL SV04 won't boot **URL:** \ **Category:** Sovol SV04 IDEX\ **Created:** [December 20, 2024, 9:04am UTC](https://forum.sovol3d.com/t/sovol-sv04-wont-boot/6316 "2024-12-20T09:04:56Z")\ **Posts on this page:** 17\ **Page:** 1
**Author:** ![Tigato](https://avatars.discourse-cdn.com/v4/letter/t/bbe5ce/32.png) [@Tigato](https://forum.sovol3d.com/u/Tigato)\ **Post date:** [December 20, 2024, 9:04am UTC](https://forum.sovol3d.com/t/sovol-sv04-wont-boot/6316/1 "2024-12-20T09:04:56Z")
Good morning, My Sovol SV04 now won’t boot, the progress bar stays at zero and the right hotend heats up constantly. I tried reinstalling the firmware, but there was only progress in the DWIN\_SET on the screen, the firmware has no progress. Can anyone help? ---
**Author:** ![mich0111](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/mich0111/32/1176_2.png) [@mich0111](https://forum.sovol3d.com/u/mich0111)\ **Post date:** [December 20, 2024, 9:38am UTC](https://forum.sovol3d.com/t/sovol-sv04-wont-boot/6316/2 "2024-12-20T09:38:19Z")
Hello, Could you explain exactly what happened when you updated the screen firmware? Is there something on the screen? Normally, when everything is correct, there’s just “End” that appears on the screen. In addition, you should also update the motherboard firmware. The two work together. ---
**Author:** ![Tigato](https://avatars.discourse-cdn.com/v4/letter/t/bbe5ce/32.png) [@Tigato](https://forum.sovol3d.com/u/Tigato)\ **Post date:** [December 20, 2024, 9:59am UTC](https://forum.sovol3d.com/t/sovol-sv04-wont-boot/6316/3 "2024-12-20T09:59:09Z")
the screen appears like this ![tela ok](https://canada1.discourse-cdn.com/flex030/uploads/sovolforum/original/2X/a/a1d10eeda209ba0a60a95cf09d19f67e694b1978.jpeg) ---
**Author:** ![Tigato](https://avatars.discourse-cdn.com/v4/letter/t/bbe5ce/32.png) [@Tigato](https://forum.sovol3d.com/u/Tigato)\ **Post date:** [December 20, 2024, 10:02am UTC](https://forum.sovol3d.com/t/sovol-sv04-wont-boot/6316/4 "2024-12-20T10:02:08Z")
I have already changed the power supply, although the voltage is ok. Before updating the firmware, the progress bar was already at zero. ---
**Author:** ![mich0111](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/mich0111/32/1176_2.png) [@mich0111](https://forum.sovol3d.com/u/mich0111)\ **Post date:** [December 20, 2024, 10:22am UTC](https://forum.sovol3d.com/t/sovol-sv04-wont-boot/6316/5 "2024-12-20T10:22:05Z")
This flash is correct : ![a1d10eeda209ba0a60a95cf09d19f67e694b1978](https://canada1.discourse-cdn.com/flex030/uploads/sovolforum/original/2X/8/8f76e084c2d7648387ec0819f915b7851770e138.jpeg) Which progress bar do you talk ? The print progress bar ? ---
**Author:** ![Tigato](https://avatars.discourse-cdn.com/v4/letter/t/bbe5ce/32.png) [@Tigato](https://forum.sovol3d.com/u/Tigato)\ **Post date:** [December 20, 2024, 11:17am UTC](https://forum.sovol3d.com/t/sovol-sv04-wont-boot/6316/6 "2024-12-20T11:17:18Z")
![this bar](https://canada1.discourse-cdn.com/flex030/uploads/sovolforum/original/2X/9/99e2529572339aaccb8bddb5a90163628bc95966.jpeg) this bar ---
**Author:** ![Tigato](https://avatars.discourse-cdn.com/v4/letter/t/bbe5ce/32.png) [@Tigato](https://forum.sovol3d.com/u/Tigato)\ **Post date:** [December 20, 2024, 11:26am UTC](https://forum.sovol3d.com/t/sovol-sv04-wont-boot/6316/7 "2024-12-20T11:26:06Z")
Does anyone know of points where voltages can be measured to detect errors? ---
**Author:** ![Lion](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/lion/32/5586_2.png) [@Lion](https://forum.sovol3d.com/u/Lion)\ **Post date:** [December 20, 2024, 11:38am UTC](https://forum.sovol3d.com/t/sovol-sv04-wont-boot/6316/8 "2024-12-20T11:38:04Z")
Did you flash both files, one for the printer & one for the screen…?? [https://wiki.sovol3d.com/en/QUICKSTART](https://wiki.sovol3d.com/en/QUICKSTART) The 1st video is about flashing. ---
**Author:** ![Tigato](https://avatars.discourse-cdn.com/v4/letter/t/bbe5ce/32.png) [@Tigato](https://forum.sovol3d.com/u/Tigato)\ **Post date:** [December 20, 2024, 12:20pm UTC](https://forum.sovol3d.com/t/sovol-sv04-wont-boot/6316/9 "2024-12-20T12:20:48Z")
the printer is stuck on the bar, to fix it I tried to update both firmwares but the mainboard firmware remains stuck. ---
**Author:** ![Tigato](https://avatars.discourse-cdn.com/v4/letter/t/bbe5ce/32.png) [@Tigato](https://forum.sovol3d.com/u/Tigato)\ **Post date:** [December 20, 2024, 12:22pm UTC](https://forum.sovol3d.com/t/sovol-sv04-wont-boot/6316/10 "2024-12-20T12:22:15Z")
I need to know if there is a way to check where the problem is before having to buy another motherboard ---
**Author:** ![mich0111](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/mich0111/32/1176_2.png) [@mich0111](https://forum.sovol3d.com/u/mich0111)\ **Post date:** [December 20, 2024, 12:26pm UTC](https://forum.sovol3d.com/t/sovol-sv04-wont-boot/6316/11 "2024-12-20T12:26:03Z")
One way to know if the motherboard is dead may be to flash it with the last firmware. ---
**Author:** ![Bjoern](https://avatars.discourse-cdn.com/v4/letter/b/46a35a/32.png) [@Bjoern](https://forum.sovol3d.com/u/Bjoern)\ **Post date:** [December 20, 2024, 1:58pm UTC](https://forum.sovol3d.com/t/sovol-sv04-wont-boot/6316/12 "2024-12-20T13:58:27Z")
My 2 cents: > [@Tigato](#): > > I need to know if there is a way to check where the problem is 1. Ensure that firmware & display software are matching. 2. Ensure that the SD-card with the new firmware is [formatted properly](https://forum.sovol3d.com/t/bjoern-firmware-install/6263) & not write protected. 3. A successful update will be indicated by a changed file name of the firmware installation file from “firmware.bin” to “firmware.CUR”. In that case at least the MPU & its seven pins that drive the SD-card interface on your motherboard are still alive… > [@Tigato](#): > > Does anyone know of points where voltages can be measured to detect errors? [Here](https://github.com/jbu313mlb92ome8w/Sovol_SV04/tree/main/Photos) you’ll find a documentation of all SV04 pins & connections on the motherboard. Checking out for +5V & +3.3V should help. Additionally, you could connect your SV04 to a PC via USB-cable. This will bring sufficient power to boot up motherboard & run the display. Good luck! Björn ---
**Author:** ![Anarchy6695](https://avatars.discourse-cdn.com/v4/letter/a/c6cbf5/32.png) [@Anarchy6695](https://forum.sovol3d.com/u/Anarchy6695)\ **Post date:** [February 3, 2025, 5:38pm UTC](https://forum.sovol3d.com/t/sovol-sv04-wont-boot/6316/13 "2025-02-03T17:38:19Z")
When I did my screen update for the new firmware it did not say how to format the SD card I know from experience of the sovol sv04 idex the SD card has to be formatted with the 4096 k block size to work I wound up spending 6 hours figuring this out while in the Forum it showed a picture but didn’t State the block size once I formatted it to that transferred the firmware been file to it and the D winds to the screen and I updated both at the same time it worked I hope this helps ---
**Author:** ![mich0111](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/mich0111/32/1176_2.png) [@mich0111](https://forum.sovol3d.com/u/mich0111)\ **Post date:** [February 3, 2025, 5:43pm UTC](https://forum.sovol3d.com/t/sovol-sv04-wont-boot/6316/14 "2025-02-03T17:43:40Z")
You forgot to mention that the SD card must be less than 8GB (2 or 4GB is better). For formatting, it seems to me that it’s FAT32. ---
**Author:** ![Anarchy6695](https://avatars.discourse-cdn.com/v4/letter/a/c6cbf5/32.png) [@Anarchy6695](https://forum.sovol3d.com/u/Anarchy6695)\ **Post date:** [February 3, 2025, 6:21pm UTC](https://forum.sovol3d.com/t/sovol-sv04-wont-boot/6316/15 "2025-02-03T18:21:10Z")
I used a 8gb sd card using fat32 filesystem at block size 4096 ---
**Author:** ![mich0111](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/mich0111/32/1176_2.png) [@mich0111](https://forum.sovol3d.com/u/mich0111)\ **Post date:** [February 3, 2025, 6:35pm UTC](https://forum.sovol3d.com/t/sovol-sv04-wont-boot/6316/16 "2025-02-03T18:35:41Z")
I’m wonder if 8gb it’s not too much but I don’t remember ---
**Author:** ![Anarchy6695](https://avatars.discourse-cdn.com/v4/letter/a/c6cbf5/32.png) [@Anarchy6695](https://forum.sovol3d.com/u/Anarchy6695)\ **Post date:** [February 3, 2025, 6:50pm UTC](https://forum.sovol3d.com/t/sovol-sv04-wont-boot/6316/17 "2025-02-03T18:50:17Z")
Worked 4 me and it booted up fast