Sharp lcd tv, model number- lc-37hv4e

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Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.
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Go to the Tuner setup screen and select cable instead of air. Then put the TV on Channel 3 and connect the cable box to the antenna connector on the TV.

Check and replace its tuner.

If the adjustments you need are blocked out either it is that something that is connected to the set for signal (cable box, sat box, receiver etc) is now in control or in some fashion you have locked out the option yourself--I would have a good look at the owner manual first and if that fails call sharp with the model number----if you recently hooked something new up to the set or moved set from one location to another it may have happened then.

That the board which it have a square aluminun box at the edge of the board with a rounded bolt sticking out for inputs like ANT. input and AV inputs for like wires components inputs like multi colors like YRW,YRWGP holes for AV inputs also have HDMI hubs inputs for the high Def Pic.There are 6 HDMI inputs hubs for the tv Sharp Aquos LC-52d64U.Tvs Tuner board signal boards are also have to been known names to called as the tvs Main Logic boards and the tvs Mother boards also.U are fixing ur tv u must have to take it parts already.U can also compare the pictures between the tv Tuner signal board u are taking aparts out of the tv and the tv Tuner signal board you are buying they'll look axactly alike.The sticker of the serial numbers of the boards a few numbers in the begining on the tv Tuner signal boards should be the same also.

Bought a conversion box!!

Yes,LCD tv have digital tuner inside.Just buy a digital antena.Plug it in the antena analog whole.Go to menu setup go down to ch.rescan should have all free air channels.

actually you dont need the tuner you just need the rf connector itself which you can easly pick up at a radio shack for a few bucks. you can DIY it will take a bit of soldering and time. First take the broken connector to radio and look for a close match, longer leads better you can always cut to fit.
remove board from tv and un solder the tuner. if solder does not seam to melt apply some fresh solder and then unsolder. pop the tuner lid of carefully both top and bottom to gain access to the circuit. cearfully remove any remains of the old connector. Now find the hole where the last part was and insert new RF connector adjust and cut the lead if nessary and resolder to circuit. place both caps back on and resolder tuner to board.connect board to ther circuit and test.

The Sharp LC-19SB25U 19 in. HDTV LCD TV has both a NTSC and an ATSC tuner.

The NTSC tuner will stop working in Feb. 2009 but the included ATSC tuner is what you need for after the digital transition.

If this is not the model number or manufacturer of your TV, then please post them.

If the TV goes in standby, then it is in protection mode.

Ensure also that the fault is not coming from a faulty receiver box sending
bad signal, check if you get same problem on DVD with no receiver box
connected.

Try first leaving the TV power cord unplugged for some times, let say one hour or so.

The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible causes.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , starting the flashing light.

If you are in situation one, then the TV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

If you want to DIY you find parts here,

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On LCD Pay particular attention at inverter and power board, power board can be inspected looking for bulged or leaking capacitors, then tested with a multimeter. The inverter is more difficult to test , there is need to read voltages, should be done by a tech. Also the LCD controller board can cause same problem

On Plasma, test Sustain (Ysus/Zsus) / Buffer boards , cables to plasma, digital board and power board.

On Rear Projection : check lamp, lamp ballast, power board, and convergence.

On CRT TVs, check ballast , flyback transformer, CRT, Tuner, Convergence.