Connect the USB cable directly to the motherboard ports at the back of the PC rather than front-panel hubs. Use a high-quality, short OEM data cable. Step 6: Perform a Hardware Check
If all software workarounds fail, the problem likely stems from a physical hardware fault.
: Using a standard DA file that lacks the correct External Memory Interface (EMI) configuration for your specific chip variant.
: Search for a modified DA file specific to your chipset (e.g., DA_6765_6785_...bin ) on community forums like XDA Developers 3. Adjust SP Flash Tool Version The latest version of the tool is not always the best. Stable Versions : For many older or budget MTK devices, version is considered the "sweet spot" for avoiding RAM exceptions. Compatibility Mode : Right-click flash_tool.exe Properties Compatibility Windows XP (Service Pack 3) and run as Administrator. 4. Refined Flashing Procedure Untick Preloader : Try flashing without the
Locate the field at the top of the interface.
Here are the standard methods to resolve the "Ext RAM Exception" error, ordered from easiest to most advanced.
A residual charge in the device’s capacitors can keep the RAM in a zombie state.
: A corrupted or incorrect preloader file within the firmware package preventing RAM initialization. Proven Solutions
The physical RAM or eMMC chip on the motherboard is damaged or degraded. Step-by-Step Solutions
If you have tried all the above on two different computers with three different USB cables and two versions of the firmware, you likely have hardware damage.
Verify your device's exact model number under the battery or on the original box.
