Connect with us

Digital TV box lost picture

Reply to Thread

Discussion in 'Troubleshooting and Repair' started by davidxyz, Jan 18, 2014.

  1. Jan 18, 2014 #1
    davidxyz

    davidxyz

    2
    0
    Jan 18, 2014
    I have a digital TV box in the UK that stopped outputting a picture through the HDMI and SCART ports. If I leave the box off for a week, the picture works for about one minute and then goes off again. If I switch it on after a day, it won't work. But leaving it off for a long time (weeks) makes it come back on briefly. What component would cause this behavior?
     
  2. Jan 18, 2014 #2
    davenn

    davenn Moderator

    13,164
    1,711
    Sep 5, 2009
    check particularly in the power supply section for electrolytic capacitors that have bulging tops
    I have had 3 settop boxes fail that way

    cheers
    Dave
     
  3. Jan 18, 2014 #3
    (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,158
    2,676
    Jan 21, 2010
    The first thing I'd look for is swollen or ruptured capacitors in the power supply.

    The problem may be caused by ripple on the power supply which affects this part of the unit before affecting other parts.

    It's also a relatively simple thing to look for and a pretty safe start.

    I you find anything, post some pictures.

    edit: *snap*
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Similar Threads

  1. polaroid tv no picture

  2. sony tv picture complaint

  3. TV box H96 Pro + repair

  4. Hitachi 46UX10BF TV - Issue With Picture

  5. TV Picture fault. NEED HELP ASAP

  6. Fuzzy Picture in LG Projection TV

  7. Philips tv w/ sound but NO Picture!

  8. Toshiba CRT TV Model 21S1ES- No picture

Loading...
Electronics Point Logo
Continue to site
Quote of the day

“”

-