At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
Set powers-on normally, but a few seconds later the screen goes black. After losing the picture, the sound continues, channel can be changed, etc. Regardles of the time interval between powering down and powering up this cycle is repeated.
NOTE: Model # on the back of the TV is LC-40D32U. Techial service @ Sharp told me it th same as LC-32D40U; however, the hook-ups are vertical on my set and horizontal on the LC-32D40U.
Dyllan: Thanks. Inspection of the capacitors did not reveal any with expanded tops or that are leaking. There are a oouple of small ones that do not sit flat on the board and are somewht tilted; however, no bulging tops or leakage. Re the heat issue, I have several questions: 1. should the fans begin running when the TV is powered-up? 2. if so, and they don't, would that result in the picture being "turned" off even though the set was not yet over-heating? 3. if the fans are running properly could the problem be with the heat sensing "switch"? That it is malfunctioning and shutting the picture off in error? and finially, 4. There are enclosures with an approx 1" diameter opening on each corner of the rear - are these the fans? If so, do they suck air in and force it up through the set and out the louvers on top or do they do they function as exhaust fans sucking air down and out?
Thanks, frugal_billDyllan: Thanks. Inspection of the capacitors did not reveal any with expanded tops or that are leaking. There are a oouple of small ones that do not sit flat on the board and are somewht tilted; however, no bulging tops or leakage. Re the heat issue, I have several questions: 1. should the fans begin running when the TV is powered-up? 2. if so, and they don't, would that result in the picture being "turned" off even though the set was not yet over-heating? 3. if the fans are running properly could the problem be with the heat sensing "switch"? That it is malfunctioning and shutting the picture off in error? and finially, 4. There are enclosures with an approx 1" diameter opening on each corner of the rear - are these the fans? If so, do they suck air in and force it up through the set and out the louvers on top or do they do they function as exhaust fans sucking air down and out?
Thanks,
frugal_bill
You can't post conmments that contain an email address.
I believe he is right about those models being basically the same. They often make small changes like the layout of connectors so that they can have different models to sell to each store. It defeats the "price matching" ads some stores use.
It sounds like one of two issues. Either a bad capacitor (a very common problem on this model, apparently) or a heat issue. Since it seems to happen every time, even if the machine has been offline for a while, and it takes so little time to do, I'm inclined to throw out the heat issue.
Open up the back and see if you see any capacitors leaking, or crooked. I can't find images for capacitors in your machine, but I did find a site about bad capacitors on PC system boards - the capacitors are basically the same thing, so it might help you identify that.
http://www.badcaps.net/pages.php?vid=5
If you do see bad capacitors, either solder on new ones, or just replace the entire board. It should be simple to replace. I can't find parts for this online, but you should be able to get them either from Sharp or from a local repair shop.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
I had the same problem. all the service reset would only make the display come on for a few second with no "k" on the screen - only the channel would show up. I purchased a complete set of board for the lcd on ebay, and started swapping them one by one. The inverter boards were the culpret. Tele working 100% since that board swap.
Hello, it sounds like your inverter board is goin out on the set, when you change channels if you notice on almost any TV the screen goes dark and the new channel appears, it sounds like you are not getting enough power out of the inverter board to power up the backlight enough to come on. This is why the sound remains because everything else works fine and the sound is connected to the main board.
helloFive blinks - AKB circuit (automatic kine bias), the
timer/standby indicator blinks for about 30 seconds then goes to the
self-diagnosis function. Something is wrong with the video. Check video
out, Q705, 732, 761 and other components on the C board, also check
Q218, 219, 220 on the A board. In addition, unit could be in IK
blanking, try turning up screen slightly.
This solution from troylove solved my problem.troylove11 Rank: Wiz Rating: 85%, 1164 votes
This model is equipped with a self-diagnosis feature to help with diagnosis of shutdown problems. To activate this turn the unit on let it shutdown then press the input/device and menu buttons on the front panel simultaneously and hold them in for 5 seconds after 5 seconds the power LED on the front panel will blink a two digit sequence. This will be one set of blinks a short pause then another set of blinks, this will repeat 5 times. 1 - 2 = no error detected 2 - 1 = X-ray protect (high voltage or beam current) 2 - 2 = Short protect (short protect monitors low voltage supplies) 2 - 3 = Deflection protect (this could be loss of vertical or horizontal deflection) 2 - 4 = Vertical protect (usually loss of vertical from the source.
All symptoms in your TV shows that you need to replace its Lamp as it has been consumed its life hours and TV requires new lamp. Lamp can be obtained from Sony Website. Price is $200, Hope this info will help you to enjoy your Sony TV in coming days.
First check set for problems by:This model is equipped with a self-diagnosis feature to help with diagnosis of shutdown problems. To activate this turn the unit on let it shutdown then press the input and menu buttons on the front panel simultaneously and hold them in for 5 seconds after 5 seconds the power LED on the front panel will blink a two digit sequence. This will be one set of blinks a short pause then another set of blinks, this will repeat 5 times. 1 - 2 = no error detected 2 - 1 = X-ray protect (high voltage or beam current) 2 - 2 = Short protect (short protect monitors low voltage supplies) 2 - 3 = Deflection protect (this could be loss of vertical or horizontal deflection) 2 - 4 = Vertical protect (usually loss of vertical from the source) 1. Self-diagnosis error 2-3 indicating deflection failure. Check for shorted or leaky Q5A37 part # 260P818050 located on PCB-Main. If found defective replace only the transistor instead of the Main PCB.
Wiz
Dyllan: Thanks. Inspection of the capacitors did not reveal any with expanded tops or that are leaking. There are a oouple of small ones that do not sit flat on the board and are somewht tilted; however, no bulging tops or leakage. Re the heat issue, I have several questions: 1. should the fans begin running when the TV is powered-up? 2. if so, and they don't, would that result in the picture being "turned" off even though the set was not yet over-heating? 3. if the fans are running properly could the problem be with the heat sensing "switch"? That it is malfunctioning and shutting the picture off in error? and finially, 4. There are enclosures with an approx 1" diameter opening on each corner of the rear - are these the fans? If so, do they suck air in and force it up through the set and out the louvers on top or do they do they function as exhaust fans sucking air down and out?
Thanks,
frugal_bill
×