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Astar LTV3001 has sound, able to select diferent input, volume up and down, backlight on but no picture. I change the main board and capacitors in the power supply but still no picture. Please help..



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Astar LTV3001 has sound, able to select diferent input, volume up and down, backlight on but no picture. I change the main board and capacitors in the power supply but still no picture. Please help..


... Astar LTV-3001 Television

I have a vizio vp422 that made a loud pop and now doesn't have any picture or sound. When you power it on the vizio display light turns from amber to white but that's it. U have to unplug it to turn it off. I have checked the fuses and they are good. The capacitors look good visually. There are a couple on the power supply board that have a black cover over the top, so I don't know about those. I changed the main board and made no difference. Someone please help!


Replace its power supply regulator board as card basis. ... Vizio Standard (CRT) Televisions

Samsung ln40a530 Hello, I repaired the power supply on that TV. I changed four capacitor 10v 1000UF and 25v 1000UF and a small chip on the pcb QM806 (4894B: SI4894BDY equivalent) Now I have a good read on all output. Thank you for the help found here! But now I found a ground on the main board. 5volt is on the ground(short). I unsoldered some chip without result, the 5v is still on the ground. Could someone tell me what the problem might be?


HelloCheck the retifier diode for 5VDC for short. If it is OK, replace the regualtor IC [5VDC], if used. ... Samsung LN40A530 40 in. LCD TV

I need help changed power supply board and ss board and still no picture it is a model TC-42PX14 panasonic the red light still blinks seven times. At wit s end isn't much, can you help me.t


Check this link and select the site named 'Electro-help' You can get more details about the fault to your TV, with 7 blinks of standby light. ... Panasonic Tc42px14 42 in. TV

Hi, so I was told to replace my psu by a tech because of what the service manual said. I replaced it and its doing the samething. No picture but sound. All of the readings are coming out correct. I tried to do a reset on the logic but but nothing happens. I can do a reset on the main input board but nothing happens after it resets the TV. The fan on the main input board does not come on at all. Please help. I can control channel, source and volume but still no picture.


This no picture but sound issue is not caused due to power supply. The loic control board is also ruled out because all the other functions are operational. That leaves us with two possibilities 1) Sustain board(S) or 2)Buffer BoardsIt is not p ... Samsung HP-R5052 50 in. Plasma HDTV

I have a 42PA30RQ RCA Plasma = Has sound , no picture, makes clicking noise when I turn the set on. I changed the main supply board, av board, logic board y sustain and x board. Still no picture, just clicking and sound. Did not see any bad capacitors.


... Flat Panel Televisions

My Vizio 55XVT1A power on, has sound, but no picture. I changed new power board, main board, T-cond board, but it still same problem. What's wrong with it? Is it anything with inverter board? Than


If this is an LCD tv the backlight inverter is bad, a good way to check it is to shine a flashlight close to the screen and see if you can see a faint picture.Let me know what you find ... Flat Panel Televisions

I have problems with my picture. It looks zoomed in and is very poor. The picture looks like it changes colors and has shadows throughout the picture. Whats wrong with it. Is it a DMD board, DMD chip or is it the main input board. Please help..


Before I can suggest anything its best if you can get me an image of the screen with the tv on so that I can see for myself. ... Samsung HL-S5679W 56" HDTV

I have an RCA L32WD22 that has picture but no sound. It wasnt powering on so I changed some capacitors on the power board and now it powers on fine but no sound, so I ordered a new sound board and still no sound, all connections are snug, what could this be??


Make sure your power supply outputs are all within tolerance. Second verify that mute isn't turned on. Next, check and see if your model gives you the option to turn off the internal audio. Some sets give you this option for those who want to use sur ... RCA L32WD22 32 in. LCD HDTV

Hi, Im working as a electronic technician in a garment factory.i have JUKI 1900 bar tack machine There's a fault in main circuit board. When I press the ready button, pressure foot goes up for a while n Itz comin to down position.acording to the my knwlage holding current of pressure foot solonoid is too low. I changed the power transistor but the problem still same.I change the the circuit board and itz working porperly with new circuit board.pls help me to repair the old circuit board


If your problem is solve then ok otherwise call me 9915100566 kamali try to help you ... Flat Panel Televisions

Have a LG 50pq30c-ua. it has no picture or sound. the blue light clicks and sounds like it wants to come on. i looked at the main power board and i dont see any breaks, cracks, or burns. the capacitors arent swollen or leaking. i swap out the capacitors if i knew which ones to change. should i change them all?


... Flat Panel Televisions

I changed the main board of my sony 46ex620 and now is turning on for 2 seconds and the red light blink 10 times, I need help. I think I need replace the power supply board someone help me please


... Sony Bravia Kdl-46ex620 Internet Tv Compatible Full Motion

I have a baird x47dtv and we turned it on today but had no picture or sound. the blue power light comes on and flickers as it should on startup of tv,however we are still not recieving a picture. i have replaced the psu's approx 6 months ago so i know theres no problems there,but am unsure which part i need to replace as it could be 1 of three things. 1 it could be the main board, 2 it could be the power invertors or 3 the screen. any tips would be helpful


Tried to disconnect first the supply voltage of the inverter board and then turn on the tv. if the indicator stay which mean the inverter board would be the cause of shut off or the tv turn to safety mode. ... Flat Panel Televisions

I have a RCA M50wh74s Have no picture but have sound. I have replace Lamp and ballast on set still no picture, someone said it may be power board please help?


... RCA Projection Televisions

HI, I have no picture of sound. When I turn the TV on I get a series of clicks then the light turns from red to green and flashes green 3 times. I checked the power board and found 9 bad caps and replaced them but still no picture and the TV does not come on. Please help.


3 blinks indicate a failure in the power source. \012\012\012You will need to test it, identify the failed output line (most likely it's the 3,3 v one) and replace the failed parts - most likely the rectifier.Use this manual for a more pr ... LG 50PC3D 50 in. Plasma Television

Hi i have a samsung ue40c8000, im getting problem where the left half of the screen goes all fussy with a bad picture but the right side is fine. If you tap the tv it goes back to normal again. Ive changed the power board and the Tcon board but am still getting exactly the same issue. Where do i go from here? Or is it scrap? Thanks, any help would be much appreciated. Rich


... Flat Panel Televisions

New problem got no backlights changed power supply and ssb boards three times but still no backlights if anyone has an idea ow how to test them or fix it please help oh buy the way its magnavox 52mf437s/37 and they worked before ssb was changed first time


Do you have the 24V DC running into the Inverter? ... Philips Magnavox 52MF437S/37 52 in. LCD TV

LG 42LK520 LCD TV screen takes 20 minutes to come in clear. During this 20 minutes, top 2 inches of screen works fine, but the rest of the goes black or picture freezes off and on during this time. I was informed the most common problem is bad capacitors on power supply. So I purchased a whole new power supply, and changed it myself! But unfortunately it didn't fix the problem.... Need help please


Is it cable tv ... LG Flat Panel Televisions

I changed the main power board on my Sanyo DP52848 thinking it would solve the problem. There still is no picture or sound. The green light is on. What could it be?


... Sanyo DP52848 52 LCD TV

Sound but no picture, can change channels, red flashing light on power supply board. Please help.


The problem is likely with the screen itself. The power supply usually supplies both screen and speakers and has a light flashing on it indicating that it has power. Screens are often not worth replacing unless under warranty as they can sometimes co ... Memorex MLT3221 32 in. LCD TV

No picture or sound with a red flashing power light. Have replaced the convergence IC's but no change (do not have the chirpint sound). Removed main power board & green LED does not light up


On that model the conv IC is usually not the solution. I believe its the blown capacitor problem with is an easy fix. Check the site www.TvRepairKits.com for a repair kit. ... Hitachi 53UWX10B 53" Rear Projection Television

I have hitachi t.v. model p50s601 when i turn it on the picture appeares about 1 second imeddietly turns off when it turns off no audio and no picture. already changed the capacitors on the power board c553-c552 = to 3300uf to 100 volts. checked xbus/xsus apperantly no problem. on the power board there is a voltage of vs=88.3v appeares in seconds then imediatly goes to 0. my question is what else can i check? or what could be the problem? thank you for your assistence.


The main rail voltage is not building up and so there is a possibility of a high drain on the output sections. The +B voltage seems to come up and then flatter off as there is a negative feedback to the processor to cut off ... Flat Panel Televisions

Hi, can you help me with this TV please. Hi, I have a Olevia 232-T11 LCD TV. First my TV wouldn't turn and the blue light just stayed on. I replaced the power supply board and now my TV turns on and the screen lights up but I get no picture or sound. The slave backlight inverter board has a blue light when you turn the TV on but goes away shortly after. The screen stays on but I have no sound or can't control the channel, volume or source button. Please help.


If the tv is not coming on but there is no picture or sound then it is a 100% guarantee that its a problem with the audio/video main board of the tv. I am sure that replacing the same would resolve the problem. Please get me the part number that is p ... Flat Panel Televisions

No picture I have replace logic main board and y main board but it remain into standby when it does not show that the is remote interference and I plunge out the logic main board from the power supply it gives sound and I can change channel.


... Samsung PS42B430 42 in. Plasma TV

Samsung lnt4665fx xaa video prolbem apperas main board has been zapped visible burn marks on hdmi port 2 blue light under samsung still comes on and red light flashes and relay clicks but no audio or video replaced caps in power supply did not help should the main board be replaced? should the main board be replace any suggestions would be helpfull thanks


... Projection Televisions

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