Insignia NS-LCD40HD-09 - Measurements and Adjustments; Accessing Factory Settings

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7. MEASUREMENTS AND ADJUSTMENTS
The way to the factory mode menu:
1st, adjust the volume to zero in the TV state,
2en, input 9876,
3
rd
, press “ok”
Finished these operations , system will be into the factory mode menu.
1. Factory menu
2. 1) RF Upgrade
2) Service Menu