20 Most Recent Sharp Aquos LC-37G4U 37 in. HD-Ready LCD Television - Page 9 Questions & Answers

Most problems with TV not turing ON is a power supply related problem. The relay click are a normal process that powers up the circuit boards. Right now the TV is most likely in " Protection Mode ". The TV detected a bad circuit board and it will prevent the TV from fully turning ON. This keeps the other circuit board from being damaged.
The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board.
But, I can't say it's 100% the problem because I can't actually look at the tv over the internet.
If by chance the TV is still under warranty, go that route.
If not under warranty and If you have some electronic experience, if you can find and purchase a Service Manual over the internet. This will help you diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, red light blinking codes, test points, and part# lists. Usually, cost under $20.

I hope I shed some light on the subject for you.

Downloaded the updated firmware from the sharp website to a usb drive. Placed the drive in the TV and went to the update software option on the TV menu. Since the update, I no longer get the black-outs on the screen. I also put the resolution on the 360 back up to 1080p and it works great, even through the component cables.

call sharp unit has 2 day service

does it do it on other inputs

will need to replace the main board

If it's the LC-37G4U model, double check the System Cable that links the TV to the box. Then, open the front cover of the box; with the TV ON, press the small SYSTEM RESET below the INPUT 3 port.
Let me know if this solution works.

YOU HAVE TO BUY IT FROM SHARP WWW.SHARP .COM

When you are changing channels you are using the tuner of the sat reeiver. the tv does not know you are changing a channel . It is just receiving a constant signal from the SAT receiver. I would suspect a problem with the receiver. Try another one first .

Almost all intermittent audio or audio failure problems with Sharp Aquos LC**D4U, LC**D5U, LC**D6U, and LC**D7U televisions are the result of a relatively simple design flaw involving the heatsink pad compound used on the Tripath TA-2024 amplifier chip (IC2502) found on the A/V board. This compound has a fairly low melting point and, over time, tends to seep out from between both top and bottom heatsinks onto the legs of this chip as well as onto circuitry immediately surrounding it. Further, over time the seeping compound also becomes somewhat conductive creating bridges which short the audio amplifier circuit causing everything from intermittent audio to complete audio failure.

Fortunately, in almost every case audio can be completely restored by cleaning the old compound from both top/bottom heatsinks and from both sides of the PC board in the area immediately surrounding the chip (I used rubbing alcohol which worked quite well). Sharp has issued a service bulletin addressing this issue (LCDTV-194) wherein a ‘2502 Heat Kit’ is specified. This kit is Sharp Part Number: PSPKIT663WJZZ and is available from circuitcity.partsearch.com for $19.95. However, it’s entirely possible to get by with the heat pad only, Sharp Part Number: PSPAZA663WJKZ for only $9.95. Please note that board replacement for this problem is almost never necessary, so if you’re working with a repair technician be sure and insist that he/she be certain to try cleaning the old board and replacing the aforementioned heatsink pads before charging you for a new board.

If one is reasonably familiar with electronics disassembly/reassembly and is willing to take their time, this can even be a DIY project. It is possible to find ‘important service references’ by simply entering LC26D4U (the 5, 6, and 7 series are very similar, and this information covers all screen sizes) into the search field at eserviceinfo.com. This will greatly aid in disassembly/reassembly of the TV, as the A/V board is somewhat ‘buried’ under other boards. Please refer to post # 373 at avsforum.com/avs-vb/showthread.php?t=647174&page=13 for pics of the information detailed here.
My knowledge of how to solve this issue came primarily from finding the research efforts of ‘Aureius’ on the AVS forums, and particularly from his taking the time to post the solution publicly so that others might save time, money, and aggravation. I'm just passing along the information. Thanks Andy!
I also wanted to mention that a couple of other very pesky common problems with these series of Sharp TV's involving symptoms of random powering-off and/or powering-on, and 'function lock-ups' of various sorts are easily remedied through two firmware updates (Main CPU: PH1UU112, Monitor: MD1UA104). These are not available to end-users via the internet but it may be possible to get the files from an understanding factory-authorized repair tech. They are installed using an SD memory card (don't use the HC high capacity sort, use only those that are NOT HC) which is inserted into a special slot in the back of the machine. For those of the DIY persuasion, information about how to check whether your TV has old firmware in need of an upgrade is readily available through internet search.

PROBLEM AND ITS CAUSE : When you turn the tv on, if you hear a faint “pop” noise from the speaker, the problem is with the heat sink under the audio IC. Over time, the heat sink will lose its consistency and start to melt, thus shorting out the audio circuit.
SOLUTION : To fix, you’d need to clean off the melted residue on both sides of the audio IC as well as replacing the heat sink with a newly redesigned Sharp Heat Insulation Pad.
SUGGESTIONS : It’s a pretty complicated fix, I suggest calling your local authorized sharp service center to fix this problem.The part is inexpensive, so you’re most likely looking at a labor charge (maybe around $200ish) for the repair if they are not marking up the price too much.
I hope that solves your Problem, If so kindly accept it.
Thank You, Arjun.

Please be aware that this a big problem on this unit. The insulator material used by sharp to between the IC's on the AV board both on top of the boards and underneath the the AV pcb is failing. This insulator is mounted to the IC and under the metal heat sinc. Remove the back and pull the AV Board out of the unit. Use zylene or alcohol and clean all of the grey insulator from between the pins on the ic and order the replacement insulators from Sharp. Most times this will correct the no sound problem. Sometimes this has also damaged the AV pcb and it will have to be replaced. The parts that should be replaced come in a kit with sharp part # PSPKIT663WHZZ. If the kit is not available the 2 parts needed are PSPAZA663WJKZ AND PRDARA216WJFW.

Replacing the cable box may fix the problem. But, you're the 4th person to have this same problem with this SHARP TV MONO only audio.
Try system reset button on the back of the TV or the box.

Most TV's have problems doing 1080p over component. Dial the Xbox back to 1080i. Make sure the big switch on the Xbox AV cable is set to 'HDTV' not 'TV'(common problem) If the problem persists, try plugging into different hookups, use HDMI (if your console supports it) or buy one of the HDMI adaptors from PDP or MadCatz if your console doesnt. HDMI will reduce the clutter and will make 1080p a reality.

Sorry, 9 times out of 10 this is a defective LCD Panel....Call Sharp customer service and the may extend your warranty.