Service ManualModel No.:- 45-2.2,then input USB , press "MENU"8893 and choose "SW upgrade" and then press "Vol+".2.3,Now you should choose "Yes",TV begin to update.You should reset TV after update.Note: When Upgrade on the process, please don’t Power-Off!Haier MST318 F/W upgrade with USB SOPStep 1: Ready for F/W Upgrade1.1 Prepare a USB memory .1.2 Copy the software file(merg.bin)from your computer to the USB memory,and removeit from computer’s USB port!Step 2: F/W Upgrade2.1 AC ON8-2 Upgrade software