Acer AT4220A AT4220A Service Guide - Page 65

Speaker No Sound H Audio R/L source had plug IN? no Check Audio R/L source cable Video can Display ? no Check Video cable or Replacement Video Cable Mute turn off Volume set 50 Speaker R/L cable plug IN? no Check Speaker cable or Replacement Speaker cable Speaker have Sound Output no Replacement IO/B or Speaker Speaker have Sound Output ? no Replacement M/B END Chapter 3 58