Charger shows E11 and the screen may flicker or reset intermittently.

Safety first: Internal power supply issues can expose hazardous voltages. Only qualified persons should open the charger.

• 1. Check external power stability: Verify that the supply voltage is stable and within specification. Frequent brownouts or surges can trigger E11.
• 2. Remove from service temporarily: If the display is flickering or the unit is resetting, stop using the charger to prevent further damage.
• 3. Internal inspection (technician): With power disconnected and capacitors discharged, inspect the control board for bulging capacitors, burn marks, or loose connectors between the main board and display board.
• 4. Reseat connectors: Carefully unplug and replug low-voltage harnesses to ensure solid contact.
• 5. Replace control board: If visible damage is present or E11 persists, replace the main control board or the dedicated low-voltage power module, depending on the Primecom model design.