Question about Vivitek V37835 46 in. LCD Television

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HELP WITH VIVITEK FALT SCREEN TV

How do I do this?

(chek your power module.check your electrolytic capacitors both in the input & output side of the power module).

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Hi check the electrolytic filttering capacitors in your power secondary side for any swelling up or burst & the big electrolytic power capacitor in the input or primary side of your power moudle

Posted on Nov 09, 2008

  • olayoju victor Nov 11, 2008

    call for electronic man around you to troubleshoot ur power pack for u


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I have a toshiba tv model #50L1400U. After the tv warms up the picture will flash every 3 to 4 seconds on all inputs. Should I replace the power supply, main board, or both? Thanks


This is mostly power pack problem . check for bulge capacitors in the secondary side of your power , if non check vividly the reservoir capacitor of the primary side very well or even consider it change because it seems the power is not having sufficient capacity to power the load or output ,if ok then.Disconnect the output plugs of the power pack & read the output with your multi meter to check for 24v ,5v & 5.5v . if not ok check for defect component or you change the power pack

Apr 04, 2016 | Toshiba Televison & Video

1 Answer

Streaks in the centre of tv right through gh


Hi Beluda

Modern Digital TV's are really just Digital Computers with a CPU & Memory & a Flat Screen digital monitor, which uses the internal computers video memory to display content.
Streaks therefor would indicate a bad ribbon cable from main pcb to flat screen video screen or a video memory problem.

Today's HD TV's are NOT like the TV's of the past (Analog) that could easily be tweaked & fiddled with to get better picture results. It is made with Solid State Digital computer components.
So.... with that in mind.
Do you have the technical ability to fix a computer's internal cpu board?

If so, Open it up and put on your anti static strap & lets go.

Disconnect The Power.
Switch off at the wall to retain an antistatic ground point.
If you have a 3 pin power outlet (ground pin)

Check internally for poor connections (cold solder) or loose ribbon cables & connectors?
Look for cockroach & insect bodies & droppings on the circuit boards. (Shorts)
Look for overheated or damaged components.

But.... the biggest & most likely problem is that the DC voltages are not stable. (Poor Filtering)
This is caused by Leaky or Bulging Electrolytic Capacitors.
They have internal chemicals that deteriorate over time. Especially by being too close to their max voltage rating (printed on side)

There are No Internal 25KV voltages to worry about on Digital Flatscreen's.
There is a shock hazard on AC side of Switchmode Board.
Electro Caps on AC Input side can hold 110 / 240v
Check the Switchmode internal power supply on DC Side for bad Electrolytic Type Capacitors.
The insulated Tin Cans on the PCB with a Negative stripe down one side
Bulging or leaky Electrolytic Caps cause many failures in modern digital TV's

If you are not a Tech Type....
Take it to a service tech & ask to check Electrolytic Caps.
Most Tech's these days will Just Do A Board Swap. Costing $$$
If you are a tech type and feel like exploring & possibly fixing the problem.

Good Luck
Switched mode power supply
https://en.wikipedia.org/wiki/Switched-mode_power_supply

How to Replace an Electrolytic Capacitor Switched mode power supply

Feb 13, 2016 | Televison & Video

1 Answer

I HAVE A BLANK PICTURE SCREEN


Hi,
You Tv have problem with the back light inverter board. This type of complaint can occur under two circumstances.
1.Faulty electrolytic capacitor in the power supply board
2. The back light inverter board.

If you have knowledge in electronics then check the power supply for any faulty or budged electrolytic capacitor. Have added the picture of faulty electrolytic capacitor how it will look like. check the link. faulty capacitor .

If the are no such faulty electrolytic capacitor then you have to replace the back light inverter board. There is no repair possible with inverter board because its spares are rarely available.

You have didn't mention any model number of your tv. so its not possible to add the exact picture of the inverter board

May 12, 2012 | Televison & Video

1 Answer

No picture but have sound


Hi,
Your TV have problem with the back light inverter board. This type of complaint can occur under two circumstances.
1.Faulty electrolytic capacitor in the power supply board
2. The back light inverter board.

If you have knowledge in electronics then check the power supply for any faulty or budged electrolytic capacitor. Have adde the picture of faulty electrolytic capacitor how it will look like. check the link. faulty capacitor .

If the are no such faulty electrolytic capacitor then you have to replace the back light inverter board. There is no repair possible with inverter board because its spares are rarely available.

You have didn't mention any model number of your TV. so its not possible to add the exact picture of the inverter board.

Ajin

May 07, 2012 | Samsung Televison & Video

1 Answer

Black screen with sound


Hi,
You Tv have problem with the backlight inverter board. This type of complaint can occur under two circumstances.
1.Faulty electrolytic capacitor in the power supply board
2. The back light inverter board.

If you have knowledge in electronics then check the power supply for any faulty or budged electrolytic capacitor. Have adde the picture of faulty electrolytic capacitor how it will look like. check the link. faulty capacitor .

If the are no such faulty electrolytic capacitor then you have to replace the back light inverter board. There is no repair possible with inverter board because its spares are rarely available.

You have didn't mention any model number of your tv. so its not possible to add the exact picture of the inverter board.

Ok

Feb 19, 2012 | Sanyo Televison & Video

2 Answers

HI, I have a sony BRAVIA TV model KDL-40S2530 never connect on any antenna (so no update possible). The power PCB is G2A ... and after 1/2 H, the tv power off - on - off -on like a...


I sounds like heat might be a factor.
You can get a can of circuit cooler and spray the ic and see if it works longer.

You can test the IC6100 by looking at the input and output. If the input voltage is in specs and the output falls then IC6100 may be at fault. If you have an oscilloscope with two probes you can see it in real time.

You can get a similar action with bad electrolytic capacitors which will eventually fail. You can replace the electrolytic capacitors with low ESR high temperature one.

Mar 13, 2011 | Televison & Video

1 Answer

I have a vivitek 32 in. lcd hdtv.no picture


Tv have problem in power supply board.Check power board replaced the capacitors parts.Like puff up,burst up.Or replaced the whole power board,tries Shopjimmy.com,Ebay.com.

Jan 18, 2010 | Vivitek V37835 46 in. LCD Television

1 Answer

The tv has no power going to it


disconnet your power moudle from the tv, cheak for any physically burnt componets or any swollen or burst electrolytic capacitors & replace such if any. power on your power unit & check the outputs for the correct output voltages . if no output ,troubleshoot more to restore your outputs. if outputs are ok & no power, unplug your power unit output to the backlight inverter & power on again. if no power ,order for new analog/digital converter board

Dec 03, 2008 | Goodmans W280NS Television

1 Answer

Vivitek 32 L32PL1A no picture, black screen


chek your power module.check your electrolytic capacitors both in the input & output side of the power module.

Oct 05, 2008 | Vivitek V37835 46 in. LCD Television

2 Answers

VIVITEK 56"


check your power module output terminals for correct output

Sep 06, 2008 | Vivitek V37835 46 in. LCD Television

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