LED TV NOBLEX turns off suddenly

[sergiol]

Hi to All,
Tv  turns off suddenly. The main pcb is a 5800-A8M19B-0030. The power board is a 5800-24ELB-0000.
I have checked all the Power board voltages according to indications on board, and all present and correct.
Chassis is simil to TV Skyworth 24e20HM
Any suggestions ?

[Ere]

hi

if sure all the output voltages from the power supply are ok and with in the range then what does mean tv turns off?

do you mean that tv goes totally off, green light becomes red, no sound no picture?

or the picture goes off and still there is sound?

[sergiol]

Hi, green light becomes red. When I turn on again, starts OK but after a few seconds returns to standby condition. Thanks for you replay





Traductor de Google para empresas:Translator Toolkit
Traductor de sitios web
Global Market Finder
Desactivar traducción instantánea
Acerca del Traductor de GoogleCelularesPrivacidadAyudaEnviar comentarios

[Ere]

ok there must something wrong either in the power supply or in the main board,

since the tv works for seconds and then goes off, this means that the tv goes to protection mode due to some bad components either in inverter board or main board or t-con board, what you have to do is isolate the problem, try removing the cable that goes to the inverter board and turn on the set, if the tv does'nt go to stand-by again this indicates that the inverter board is defective, do the same thing with t-con board by removing the lvds cable that goes from main board to t-con?
if this does'nt lead to any result then suspect a defective main board...

try touching on regulator ics if they get very hot on main board, high esr capacitors either in psu or main board could cause similar problem...
by doing this it must lead you to some conclusion.

good luck