FormulaFlash Bench Mode No Power Issue (A1–A6 Not Working) – Repair Guide

Issue Description

Some users of the FormulaFlash ECU Programmer have reported the following problem:

  • No power output in bench mode
  • LEDs do not light up
  • Ports A1–A6 are not working
FormulaFlash No Power in Bench Mode (LED Not Lighting Issue) 01
FormulaFlash No Power in Bench Mode (LED Not Lighting Issue) 02

This issue may occur even when the device is still under warranty.

Root Cause

According to engineering analysis and official repair documentation , the failure is typically caused by:

Burnt or damaged FB resistor (FB0 / FB9 position) on the PCB

When this component fails, it interrupts the power circuit, resulting in:

  • Complete loss of bench power
  • Inactive LED indicators
  • Non-functional A1–A6 channels

Official Repair Solution

Replace FB Resistor (FB9 Position)

The official repair instruction is:

Replace a new 0Ω (zero-ohm) resistor at the FB9 position

This restores circuit continuity and allows the device to function normally again.
Replace a new 0Ω (zero-ohm) resistor at the FB9 position

Alternative Repair Method (If 0Ω Resistor Not Available)

If you do not have a 0Ω resistor, engineers suggest:

  1. Locate a row of similar resistors on the PCB
  2. Remove one resistor from that row
  3. Solder it onto the burnt FB position

✔ This method works because 0Ω resistors function as jumpers in the circuit.

⚠️ Important:
Always confirm the exact component location (FB9) using the official PCB diagram provided in the PDF.

Important Notes

  • This repair requires precision soldering skills
  • Incorrect operation may cause further PCB damage
  • If your device is under warranty, it is strongly recommended to:
    • Contact your supplier before attempting repair
    • Avoid self-repair if unsure

Prevention Tips

To reduce the risk of this issue:

  • Ensure correct wiring before powering on
  • Avoid short circuits during bench operation
  • Use a stable and regulated power supply
  • Do not connect/disconnect ECUs while powered

Conclusion

If your FormulaFlash device shows:

  • No power in bench mode
  • LEDs not lighting
  • A1–A6 ports not working

The most likely cause is a burnt FB resistor (FB9 position). Replacing it with a 0Ω resistor is an effective and proven repair solution.

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