Dead set toshiba mod no 52xv540u

THINGS TO TRY TO FIX YOUR TV FAST:

1. Try to connect all connectors including HDMI, coax, etc, to be sure all inputs are producing same issue.
2. Push the HDMI connector firmly into the back of the set.
3. Be sure your actual cable is not bad and causing the issue.

First: Open up the TV case (unplugged of course) and look for a bulging or leaking capacitor. If you see any that are leaking or fat and bulging, replace them. If you find no bad caps, you could replace the complete circuit board but that may be more than the TV is worth. Some of these issues are common on Samsung, Sony, Vizio, and Toshiba. Here are some places to buy caps and circuit boards for replacement HDTV parts.

If totally dead check your power supply diodes, caps, etc.

Looks like a Tconn problem caused by
1 Main Power supply inside unit
2 Tconn board itself, or ribbon cable connections
3 panel, or ribbon cable connections from Tconn to panel(screen)

could be back-light or inverter or just a cable connecting them to the screen

Hi, First check that you have good power coming in from plug.
If that is good check out power board (capacitors Bad) replace if oozing out or bulging out. If you are good with soldering then do so.
Replace with same capacitors or better ones.

Either by the remote control or by the power switch on the TV?
The power supply may have died but check the AC outlet first to be sure, otherwise it will require you to open up the TV and do in-depth troubleshooting.
Please read my guides first if you are goping to do DIY repair:
Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Parts: http://interliquidparts.com/

Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
Please post back what you find.

Based on the symptoms you describe - the quick shutdown shortly after powering up - you may consider using the following:

http://www.coppelltvrepair.com/p/427/repair-service-for-toshiba-32av502r-intermittent-shutdown-random-shutoff-not-powering

It calls for sending in the power board and the main board for evaluation/repair of exactly that symptom.

Hope this helps!

Hello,

Common problem with this TV is the power supply module.
Check the power supply; look for bad caps with leaking/bulging tops, check to see if you have standby +5vdc at the power supply connector, the front red indicator will not be on if you do not have this +5vdc standby voltage due to shorted out transistor and zenerdiode, if otherwise, Your power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Hope that this will help in solving the problem, also do take care in handling the fault, because it contains high voltages...

Do you have any tv repair exp? If not take it to a shop! If you do, then check for swollen caps.There are 5 fuses in that set,2 glass ones and 3 light blue solid that says 5 amp. I have a same mod. tv as you that I can't fix. It's probably the main power board as is mine. The board but most likely has to be changed. I am checking on a price and don't know yet. I have 35 yrs. exp. in repairing tvs. I can fix most of the lcds that i get. Sometimes I have a hard problem.If you don't have any tv repair exp.then you need to take it to a shop.Either they can fix the board or find another one,perhaps a used one,which will be a whole lot cheaper. The tv is still worth putting a few hundred in it, unless you can afford a new one. Maybe a bit smaller since they are coming down quite a bit. I will let you know what happens with mine!

Ur high voltage is dead,FBT,the flyback transformer is dead,the block of plastic with a red wire with a cap hook to a CRT(tv tube).