Question about Sceptre X37sv-Naga 37 in. LCD Television
Our 1.5 year old Sceptre X37SV-Naga suddenly stopped working today during a lightning storm. I took it apart and found a short circuit between two small capacitors adjacent to the 110volt power cord input to the power supply board. Any one else had this problem? Anyone have a wiring diagram? Do you think this problem would be fixed if I simply replace these two capacitors that are arching? I had this problem many years ago with a B&W TV and replace one resistor that blew after a storm and it worked perfectly afterward. What say you experts? Thanks for your help. MJK
I have the same problem. TV was JUST out of warranty. Sceptre part number is X37SV-Naga and the cost - $285.00 plus $20 shipping. Non-refundable, no returnable.
The TV is of course going to de-solder the board within a year again, so either a good heat sing on both thermistors is in order OR a law suit against Sceptre is in order for putting us a risk of fire.
Posted on Jul 09, 2008
I posted above with the pictures. Frank Reed has it right. I did the same thing, soldered those two thermistors back together on the underside of the PCB and it turned right on. Then it died again after a week, and I realize I didn't solder them well enough. You have to get that PCB foil in there, because it is bringing current from another component. So I just really gobbed the solder on there. It hasn't given me trouble for months. I bet this is the major reason these TVs go bad. I should start buying inexplicably broken ones, fixing them and selling them.
Posted on May 02, 2008
Had the same problem - TV was on and then just quit. SCK-85 thermistors had overheaded to the point that their input side unsoldered from the pcb. Actually part of the pcb foil was damaged on the AC input side by the heat. Checked the resistance and thermistors appeared to be okay, so resoldered them and TV is working at the moment.
Appreciate if anyone knows of a more reliable thermistor. I don't have much confidence that this problem won't recur in the future.
Frank Reed, firstname.lastname@example.org
Posted on Jan 01, 2008
I have the same problem. They are not capacitors but thermistors. They are manufactured by Thinking electronics in China. They are SCK-085. Problem is - I cannot find a 13mm 085 in the catalog. Only 15mm. I order a few - will see if this fixes the problem.
Posted on Oct 04, 2007
Pwor suply shot
Posted on Mar 23, 2013
I had the same problem recently with my 3 yera old X37 from COSTCO, and when I saw the photos and posts here, I opened up the set, and sure 'nuf, the thermistors had 'unsoldered' themselves. Instead of using regular rosin-core electronics solder, I used silver-solder and the appropriate flux (usually used for plumbing, since it is lead free), which has a higher melting point than lead-tin solder. 4 months later, no problems.
Posted on Feb 15, 2009
Wow, gotta say: this page is excellent. My TV died this morning and I only got to fixing it tonight, found the bad thermistor(s), got on Google to find a replacement and found this site.
My contribution to this site is the following: My TV is branded BenQ not Sceptre. The pictures above are an EXACT match it is also a 37" LCD. Not sure if BenQ is using the same power supply or if one or the other company purchased each other, who knows.
My TV has run problem free for almost 3 years. I'm going to resolder the components and see how many more years I can get.
Posted on Aug 30, 2008
I'm so thankful to have found this website as I had the same problem as others with the overheating and a thermistor had become unsoldered. Cleaned and heavily resoldered and it's working great again! Not sure how long it will last but..... Thanks so much for the pictures, it made it possible for this novice to get it going again!
Posted on Aug 23, 2008
Had this same problem and used the following parts to fix:
EPCOS NTC Thermistor
10 Ohms 5amps 3065k
From Home Depot...
GE Silicone II
Posted on Jun 16, 2008
I have the same problem with my X37. There was arcing underneath the Thermistors, so I unsoldered them and tested them with a multimeter. One of the thermistors was busted (the reading was going down when I heated it up by pressing my soldering iron onto it). I have ordered some replacements from mouser (they are super cheap to find, but shipping was a pain). The goop in the middle is some sort of thermal caulk - i've read that GE Silicone II can be used for this purpose or heatsink epoxy. Anyways, will update if I am able to fix this. Thanks for the pics above.
Posted on Jun 10, 2008
Yet another X37 with the same problem. Mine has failed twice. I thought maybe my soldering job wasn't so good first time around so I was careful this time to make sure I have nice wet joints. However I believe this is a recurring problem. For what it is worth, the SCK 085 is a current limiting device called a Varistor (variable resistor). Apparently it does come in different current ratings, the problem is identifying the ones that are in the X37. (Bear in mind that they have to be rated for 250V also.)
Metal oxide variable resistors (movistors) are common in surge protectors. In the absence of any assistance from Sceptre, we should be able to locate a suitable replacement.
Posted on May 19, 2008
Update from Frank Reed: Since I bought my TV from COSTCO I went to them when Sceptre wouldn't communicate with me about the problem. Sceptre responded almost immediately after COSTCO contacted them. Sceptre was willing to repair the board, but was not willing to offer what I would consider a permanent fix - thermistors that would carry the required current without overheating and desoldering themselves from the PCB. I tried to come up with replacements on my own, but struck out, so I went back to COSTCO. At that point, the TV was working fine, but the COSTCO floor manager made an excellent point - "we can replace your TV, but we can't replace your house if the TV catches fire". I let COSTCO replace the TV. I had no complaints with the TV other than I couldn't trust it no to burn me out and electronics do occasionally catch fire, so good luck to everyone that has the Sceptre. Frank Reed
Posted on May 06, 2008
That would be a good start. remember that capacitors can store enough energy to shock or kill you.
Posted on Jul 11, 2007
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