FAQ
TL;DR: 1 installation PDF exists; “extract the downloaded files and then add them to the memory card.” Use the SD-card firmware to recover Jay‑Tech 799 bootloops. This FAQ guides owners through SD flashing, hard resets, and hardware checks. [Elektroda, nutergsm, post #17327502]
Why it matters: It helps Jay‑Tech 799 owners stuck on the ANDROID logo either recover the tablet or confirm a hardware fault.
Quick Facts
- Symptom: tablet shows the logo, then “ANDROID,” and stops; hard reset didn’t help for the OP. [Elektroda, grunio, post #17327364]
- Firmware package shared: Firmware_Tablet_799.zip via Jay‑Tech support (legacy link). [Elektroda, nutergsm, post #17327401]
- Install method noted: extract the downloaded files and copy them to a memory card (see vendor PDF). [Elektroda, nutergsm, post #17327502]
- Edge case: hard reset reported “dev/block/mmcblk2p6” missing for one user. [Elektroda, lukavip, post #17449834]
- Hardware reference: board label observed “M799CD-64x16-4layer-Main-V2.0.” [Elektroda, lukavip, post #17500226]
How do I fix a Jay‑Tech 799 stuck on the Android logo?
Reinstall Android from an SD card using the vendor package. Follow the shared installation PDF and copy the extracted files to a memory card. This approach addresses the boot issue reported in the thread. [Elektroda, nutergsm, post #17327502]
Where can I download the firmware for Jay‑Tech Tablet Computer 799?
A link shared by a helper points to Jay‑Tech support: www.jay-tech.de/jaytech/public_html/upload/images/support/full/Firmware_Tablet_799.zip. One legacy link was shared in 2018. Use it if still reachable. [Elektroda, nutergsm, post #17327401]
How do I prepare the microSD card for the update?
Download the firmware zip referenced in the thread. Extract the downloaded files. Copy the extracted files to a memory card as the instructions note. [Elektroda, nutergsm, post #17327502]
What should I expect during the SD‑card install on this tablet?
Users report the tablet boots from the card and uploads system files. It creates the system partition and shows a success message. Then it asks to remove the SD card and reset. One user still saw ANDROID after completing these steps. [Elektroda, lukavip, post #17449629]
Should I perform a hard reset after flashing the firmware?
Yes. The helper specifically asked whether a hard reset was attempted after uploading the firmware. Perform it only after the flash completes and the device reboots. [Elektroda, nutergsm, post #17449682]
Hard reset shows “dev/block/mmcblk2p6 missing.” What does that mean?
A user saw this message during a hard reset attempt. It indicates the reset process could not locate that partition node. When this appears, the reset did not complete successfully. [Elektroda, lukavip, post #17449834]
Could the internal memory be damaged on the Jay‑Tech 799?
Yes. As one expert noted, “It is also possible that the memory has been damaged.” If flashing and resets fail, suspect storage hardware. [Elektroda, nutergsm, post #17450958]
How can I identify my board to search for matching firmware?
Open the tablet and read the printed board marking. The helper advised disassembling and then looking for firmware based on that identifier. Photograph the board code for accuracy. [Elektroda, nutergsm, post #17450958]
My board reads M799CD‑64x16‑4layer‑Main‑V2.0. Where should I look for software?
Search Google for that exact string and model terms. The helper’s guidance was to look it up directly by the board code. Use quotes for better matches. [Elektroda, nutergsm, post #17500308]
Is the shared firmware link correct for all Jay‑Tech 799 variants?
Not necessarily. One user suspected the linked firmware was not for their unit after it failed to resolve the bootloop. Treat it as model‑specific and verify. [Elektroda, lukavip, post #17449593]
Is the Jay‑Tech 799 still listed on the manufacturer’s support site?
A user could not find the model on the manufacturer’s website. That suggests official downloads may be archived or removed. Mirror any files you find. [Elektroda, lukavip, post #17449593]
After a “success” message and reset, it still shows ANDROID. Why?
One user completed the SD‑card process and saw the success prompt. After removing the card and resetting, the tablet still looped. That indicates the flash sequence didn’t restore normal boot on that unit. [Elektroda, lukavip, post #17449629]
By “memory,” do they mean an internal SD card or the tablet’s internal storage?
The helper clarified they meant the tablet’s internal memory, not a removable SD card. Focus diagnosis on onboard storage, not external media. [Elektroda, nutergsm, post #17500308]
If nothing works, is repair worth it for this model?
The OP contemplated scrapping the device after failed attempts. If firmware access and storage checks go nowhere, some owners retire it. Consider your time and parts availability. [Elektroda, grunio, post #17449824]
