How do i change the lcd brightness, Troubleshooting – Sony SVE15125CXW User Manual

SVE14122CXB, SVE14125CXW, SVE1512GCXW, SVE14126CXP, SVE1712ACXB, SVE14122CXW, SVE17125CXB, SVE15128CXS, SVE15124CXW, SVE151290X, SVE14122CXP, SVE15122CXP, SVE1712BCXB, SVE1512KCXS, SVE15122CXB, SVE15124CXP, SVE1412ECXB, SVE1412ECXW, SVE15124CXS, SVE141290X, SVE15126CXP, SVE1412CCXW, SVE1512HCXS, SVE1412CCXP, SVE15125CXS, SVE14126CXB, SVE1512GCXS, SVE1512JCXW, SVE1512MPXS, SVE14126CXW, SVE1412ECXP, SVE1512NCXB, SVE14125CXB, SVE15126CXW, SVE15122CXW, SVE15126CXS, SVE14125CXP, SVE17122CXB, SVE17127CXB, SVE1412BCXB, SVE171290X