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7 Series Recovery Procedure for Units that Do Not Boot

Escalation Article


Written by Jerome King

Updated at September 23rd, 2026

Table of Contents

Brand: Affected Products: Summary: Troubleshooting:

Brand:

  • JBL

Affected Products:

  • 705P
  • 708P

Summary:

Some units may fail to boot completely or fail to boot intermittently.  After applying power, the boot cycle will not complete and the LCD will display “708P" or "705P”.  It may be possible to restore functionality without the need to replace board assembly or amplifier assembly. 


Troubleshooting:

The procedure to restore functionality will require that unit be sent to an authorized service center. 

Please contact HARMAN Support to locate a service center.

 

 

 

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Table of Contents

Brand: Affected Products: Summary: Troubleshooting:

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