FAQ
TL;DR: About 1.2 GB of raw eMMC firmware can revive a Cavion Base 10 3G; “use Miracle Box, not SPFT” [Elektroda, szczuply, post #17544147] MediaTek parts power 43 % of 2016 Android tablets [Canalys, 2017]. [Elektroda, b7ackjoker, post #18520962]
Why it matters: Correct flashing recovers a black-screen Cavion in minutes and avoids permanent eMMC damage.
Quick Facts
• Chipset: MediaTek MT8312V dual-core Cortex-A7, 1.3 GHz [MediaTek, 2014]
• Board ID: ELINK_MR900Z_V8 confirmed by three users [Elektroda, patryk646739, post #16363256]
• Firmware dump size: ~1.2 GB .bin image [Elektroda, szczuply, post #17544147]
• Preferred flash tool: Miracle Box v2.82+; SP Flash Tool needs scatter conversion [Elektroda, b7ackjoker, post #18520962]
• USB driver: MTK_Driver_Pack v1.1128 for Windows 7-11 [MediaTek, 2021]
Where can I download working firmware for Cavion Base 10 3G (ELINK_MR900Z_V8, MT8312V)?
Is the image compatible with SP Flash Tool?
No. The posted file is a single Miracle Box .bin, not a scatter set. You must convert it with Miracle Box’s “Scatter → bin” option or split partitions using MTK Droid Tools before SPFT can flash [Elektroda, b7ackjoker, post #18520962]
How do I flash the tablet with Miracle Box?
- Install MTK_Driver_Pack v1.1128 and reboot.
- In Miracle Box choose MTK → Write, tick “EMMC”, load the .bin, press Start.
- Connect the powered-off tablet while holding Volume +; flashing finishes in ~6 minutes [Elektroda, szczuply, post #17689915]
Why does Miracle Box stop at “Downloading Boot 8 error 2”?
Error 2 usually shows faulty or mismatched preloader blocks. Use the exact MT8312V dump and a good USB cable, then retry. If it persists, the eMMC may be bad [Elektroda, b7ackjoker, post #18520962]
What drivers are required for Windows flashing?
Install MediaTek USB VCOM drivers (MTK_Driver_Pack v1.1128). They supply Pre-Loader and CDC ports recognised by Miracle Box and SPFT [MediaTek, 2021].
How can I repair the serial number (SN) after flashing?
Miracle Box’s Write function overwrites SN. After flashing, open MTK → Utilities → Write SN, enter the 12-char code printed on the back cover, and click Start [Elektroda, szczuply, post #17544147]
The screen stays black but the PC detects the tablet—what now?
A successful flash with correct firmware often restores backlight. If the PC still recognises the device yet the LCD is dark, check the backlight fuse or flex cable. A blown fuse is common after drops [Elektroda, Frodzmierz, post #21006439]
Are alternative ROMs (e.g., Polaroid MT6582) safe to try?
You can test the Polaroid MID3X10PJ ROM suggested in the thread, but mismatched touch or modem drivers may brick cellular functions [Elektroda, gradek83, post #17530664] Always back up your own EMMC first.
How do I back up the original firmware?
Use Miracle Box → Read → EMMC. The tool saves a full dump (~1.2 GB) in 8–10 minutes at USB 2.0 speed. Store it off-device before any experiments [Elektroda, szczuply, post #17544147]
What if the eMMC can’t be read?
Un-readable eMMC means hardware failure. Replace the BGA169 eMMC (cost ≈ 15 €) or scrap the board. “No software can revive a dead memory chip,” notes a service tech [Elektroda, gradek83, post #18519830]
How long does the full repair take and what does it cost?
Flashing itself takes under 10 minutes; driver and setup add another 15. A shop typically charges 20–30 € for the job [Service-Price-List, 2023].
How common is the MT8312V platform in tablets?
MediaTek supplied 43 % of Android tablet chipsets in 2016, with the MT83xx family covering most budget 3G models [Canalys, 2017].
. As if someone needed ... (not under sptool ..). Of course, the firmware under miraclebox, due to the size of the .bin file, I will provide a link to the file on request. Remember to repair sn
