diff --git a/rd_unb2c.py b/rd_unb2c.py
index b6441b9f53f328fb71dfbc85fcd7b421c130e25a..b84d4159ba865658891052b4cdcb019ef69295fb 100644
--- a/rd_unb2c.py
+++ b/rd_unb2c.py
@@ -37,13 +37,13 @@ def rw_eeprom(value=0xAB):
 def front_led(value=0xFF, ADDRESS=0x71):
     main_switch = I2C(ADDRESS)
     main_switch.bus = I2CBUSNR
-    main_switch.write_pointer(0x20) #select LED
+    ret_ack = main_switch.write_pointer(0x20) #select LED
     if ret_ack < 1:
         print("Main I2C switch not found")
     else:
         front = I2C(ADDRESS=0x41)
         front.bus = I2CBUSNR
-        front.write_bytes(0x03, 0)
+        ret_ack = front.write_bytes(0x03, 0)
         if ret_ack < 1:
             print("Front LED driver not found")
         else:
@@ -136,7 +136,7 @@ def read_qsfp(node_nr = 0, module=0):
                 stri =  "Voltage QSFP in slot {0} node  {1} is {2:3.2f} V".format(module, node_nr, Power_in_mod)
                 print(stri)
 
-if 0:
+if 1:
     rw_eeprom(0xCD)
 else:
     front_led()