| Error | Meaning | Solution |
|-------|---------|----------|
| Device not found | Driver missing or pins not shorted | Install filter driver (Driver folder), manually short DATA0/GND |
| Bad block too many | NAND heavily worn | Use "Erase All Bad Blocks" + "Force Erase" (shorten drive life) |
| Check Sum Fail | Wrong firmware | Download correct ISP version for CHIPYC2019 (v2.0.3.x or v3.x) |
| Timeout | USB communication issue | Use USB 2.0 port, disable power saving for USB hubs |
| Write protected | Controller locked | Re-flash with "Clear Write Protect" checked in Settings |
Before using MPTOOLS, confirm the controller: firstchip chipyc2019 mptools portable
On Windows 10/11, you must disable Driver Signature Enforcement. Reboot your PC and press F8 or shift-restart into "Advanced Startup" > "Disable Driver Signature Enforcement." confirm the controller:
On Windows 10/11
| Scenario | Action | |----------|--------| | Dead USB drive not detected | Low-level format + firmware reload | | Fake capacity drive (e.g., 64GB shows 128GB) | Full capacity restore via MPTOOLS | | Create bootable CD-ROM partition | Set "Dual Partition Mode" with ISO image | | Repair write-protected drive | Re-flash controller firmware | firstchip chipyc2019 mptools portable