Question about Televison & Video
Read below and decide if you want to tackle the problem yourself if so I’ll help along the way with what info I have. If not contact the nearest repair shop armed with the info below.
A dead set (no picture no sound) can indicate any number of problems – Usually the set is in shutdown or protection mode – this means that the internal circuits have detected a problem with a supply voltage missing, drawing too much current, going over voltage or a short condition.
The first thing to do is power off the set unplug it for 5min. than replug and try again. This in effect resets the main micro and will sometime unlatch a fault and resume working. There are certain common problems based on the make model – for instance convergence output IC’s(CRT projection TV’s) can cause a dead set symptom in many models. Vertical output IC failure can also cause the same symptom (CRT standard and Projection).
The only way to determine the real cause is :
By an educated guess based on experience or by directly troubleshooting the set – checking fuses, measuring voltages and checking for shorts. Many of the intermittent problems such as, int.(Intermittent) no sound or picture, int. picture shrunken or misshaped. These problems are generally due to cold (bad) solder joints (all TV’s and electronics) that break down under slight temperature changes or vibration and are usually verified by physically tapping the suspected area on the circuit board, or by quickly heating or cooling a suspected component or area ( cold spray and hot air gun). The other main culprit is leaky or dried out capacitors or capacitors that change value depending on temperature. These can sometimes be seen as bulged or leaky and have an acrid odour. Be sure to vote/rate me if this helped Thanks!
Posted on Oct 05, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jan 13, 2011 | Panasonic TH-50PX70 50 in. Plasma TV
Nov 21, 2010 | Sony KDF-E60A20 60 in. LCD HDTV
Jun 11, 2017 | Venturer PVD730 Portable DVD Player
Jul 08, 2009 | Toshiba 43H70 43" Rear Projection...
Apr 22, 2009 | Zenith C27A24T 27" TV
Nov 25, 2008 | Emerson EWF2004 20" TV
May 28, 2008 | Philips Magnavox DVD/VCR Dual Player
Apr 10, 2008 | Toshiba MD20F51 20 in. TV/DVD Combo
Aug 08, 2007 | Hitachi C25-RF35S 25" TV
Sep 23, 2017 | Emerson Televison & Video
46 people viewed this question
Usually answered in minutes!