Emerson LC320M2F No Power

[Andrew F. Ali]

Good day All. I am trying to figure out what is happening with this LCD TV. When I received the set it was not powering up. Upon removing the back cover I discovered the fuse was open and a series of components were open or shorting. I went ahead and replaced the burnt components from a kit aqired from e-bay. These parts burnt out immediately when I replace the old ones and applied AC. So I went ahead and purchased a PSB from e-bay. I got the new board and now when the AC is applied I get no stand-by light and press the power button I get no response.
I am getting 5V (4.85V) from the ALL %V Test point. All other Test Points are low. e.g the 24V rail is 9.86V
Could it be the Main Board is defective and so not sending the P-on signal to turn on the PSB??
Thanks for any assistance.
Andy.

[Andrew F. Ali]

Re: Emerson LC320M2F No Power

Oh! There is a typo error. It is ALL 5V (4.55V) and not %V. Sorry if I confused everyone.

[bammbammfran]

Re: Emerson LC320M2F No Power

some good pictures would be helpful

[Andrew F. Ali]

Re: Emerson LC320M2F No Power

Pics of the Pwr Sup Bd upper side and lower side and main Bd.
Thanks

[bammbammfran]

Re: Emerson LC320M2F No Power

did you check the voltages using your positive probe on the silver ends of the diodes that you have marked?
Did you also check them with the main board connected and with the main board disconnected ?
Which one has 5 and which has 9.xx and is the 9.xx there if the main board is unplugged

[Andrew F. Ali]

Re: Emerson LC320M2F No Power

OK. I would re-check the voltages I got and post them. What I remember is the the ALL-5V = 4.45 and the ones that are marked as 24V = 9.75V. This is with the pwr supp bd disconnected from the Main Bd.
Really grateful for you replies.

[Andrew F. Ali]

Re: Emerson LC320M2F No Power

Had a little problem with the Crude Distillation Unit at work. Some quick thinking and sleek troubleshooting skill got it back on line in avery short time.

OK. So I decided to take the easy way out and went ahead and purchase from e-bay ($15.00USD) for a Main Bd. I figured at that cheap price it was a good investment, if it works.
I will let you know how that worked out when I get it.

[Andrew F. Ali]

Re: Emerson LC320M2F No Power

Ok. So I got the new (used) Main Board yesterday. Stuck it in and she fired up. Just quickly closed it up and delivered to the owner. So this time the Pwr Sup and Main Bds went out. Thanks bammbammfran for your interaction. Bless, Andy.