diff --git a/backup-image/intel-backlight-toggle.sh b/backup-image/intel-backlight-toggle.sh
index e34c92d..f32c6e8 100755
--- a/backup-image/intel-backlight-toggle.sh
+++ b/backup-image/intel-backlight-toggle.sh
@@ -1,5 +1,10 @@
 #!/bin/bash
-echo -n "0" >> /sys/class/backlight/intel_backlight/brightness;
-read;
-echo -n "24000" >> /sys/class/backlight/intel_backlight/brightness;
-exit 0;
+if [ -f /sys/class/backlight/intel_backlight/brightness ]; then
+  pV=$(cat /sys/class/backlight/intel_backlight/brightness);
+  echo -n "0" >> /sys/class/backlight/intel_backlight/brightness;
+  read;
+  echo -n "$pV" >> /sys/class/backlight/intel_backlight/brightness;
+  exit 0;
+else
+  exit 1;
+fi