If a direct search fails, these communities often host "dumps" (copies of software pulled directly from a working device):

If the device still turns on, try to dump the current (even if corrupted) BIOS first using a programmer like the CH341A . 💡 Hardware Alternative

A Russian technical forum (use a translator) that is a goldmine for obscure firmware.

Often has BIOS and motherboard dumps for power-on issues. Needrom: A dedicated site for mobile and tablet ROMs. ⚠️ Important Safety Tips

If you can tell me the you need the file, I can help you troubleshoot: Stuck on logo? Blank screen? Forgotten password?

The most common place for tablet and motherboard firmware.

Files from forum links should always be scanned before opening.

📍 Ensure your flashing tool (like SP Flash Tool or a hardware programmer) is compatible with the chipset on that board.