if you box does not respond or light is blinking, you have a power problem.
you need to replace a single capacitor on power supply board.
you will need :
a Philips #2 screw driver
a soldering gun
basic soldering skills

Step 1: Remove cover and supply board

Picture of remove cover and supply board
you will need to remove all screws (7-8) from the box cover.

I have the APEX DT250A and I can not turn it on, can you tell me what my problem is?? The red light is on but can do nothing else, is it a cap problem like comments below if so where do you get the new ones

Toga_Dan11 months ago

I'm in process with the dtv box. Seems this proceedure will work with other electronics, too. Caps are one of the 1st to fail, yes?

bill35 years ago

This fix worked great my box was a apex 502 but the fix was still the same

lauliu bill34 years ago
i have a bad apex 502 too, when i opened the box it has many capacitors, 2 -22muF400V(c1,c2 ) in big transformer upstream side and 4-470muF25v (c8,c9,c12,c15) in downstream side. How can i tell which of these capacitors is bad, or should i replace them all, Thanks,
ariemaayan (author)  lauliu4 years ago
you have a couple of ways to try and locate a bad capacitor without using special tools: 1- look for a deformed top where the X lines are cut, if the top is puffed a little, the caps might be bad. 2- when you power the board a bad caps will be dead cold or really hot to the touch.
caps are pretty cheap to replace and can be ordered online from digikey or go to a radio shake store. even if you replace all of them you are still ahead of the game.


My capacitor is a 470uf25V. The 25V stands for 25 volts? is that correct.

I can readily find a 470uf35V at my local radio shack. Can I use this higher voltage unit?

keep in mind my converter is already broken so I am not afraid to take a little chance, and if it blows out again I will not take this as bad advice.


ariemaayan (author)  rwjr59833 years ago
not such a good idea, you might cause the next component to fail when the capacitor discharges. try using a higher uf rating if you have to compromise .
if all else fail go ahead and use the one you got, hopefully you will not see an issue.
good luck
yes it works i have fixed a hdtv stb tevion tev8200 and a sd stb tevion md29000 model and both work !!! i got the capacitor parts from old not working dvd player and old pc power supply for pc . i had to change more thane one capacitor in each stb ,just change them if thy look bulged , and the same voltage capacitors too be safe ,my capacitor where a little smaller size but the same voltage so it still works and i put pc fans in both stb boxes too cool them thy get hot !!!!!ps : i need a remote control for tevion sd stb tev8200 to control the stb
sorry not the tev8200 i ment the -sd stb md29000 not hdtv just SD STB I DONT HAVE A remote control FOR SD stb md29000 THANK YOU