If your Dell Venue 7 3740 Merrifield has been stuck at Dell logo or its software has been corrupted, you can flash the device to get it back in working state.

You have to disable driver signature in Windows. Only then it works. Also it's the hardest flashing that I have ever seen.

1- Download the Stock ROM & Flash tool. Place it in single folder.

2- Run Flash tool first and install it.

3- Run P708T driver.

4- Now run iSOC USB driver.

5- Run Intel Android driver setup.

6- Run ADB and Fastbbot.

7- Extract the stock rom.

8- As soon as all driver get installed, run the tool.

9- Select 2nd tab as shown in image.

10- Click on Option and select Modify Setting.

11- Select the last Download Tab and select Enable GP Flag override. Chnge the value from 0x80000001 to 0x80000007 and click on OK.

12- Select File, DNX_FWR_PRQ.bin in FW Dnx.

13- Select For_Product_IFWI_PRQ.bin in IFWI.

14- Select DNX_osr_PRQ.bin in OS Dnx.

15- Select Droidboot.img.POS.bin in OS image.

16- Click on Begin Download.

17- Connect Tablet to PC by holding Volume UP key and connect it to USB cable until driver get installed.

18- Now flashing starts and when completed, Success: FW + OS Download Completed will appear in tool box.

19- Now, the tablet will automatically enter into recovery mode.

20- Under Firmware folder, run P802_Flash_device_lte. Flashing will start of its own.

21- When completed, cmd will show a message Press any key to continue.

22- Unplug cable, as flashing is completed.