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Loose contact power supply - Apex Digital AT2402 24" TV

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How to repair the dso power supply ? is there a circuit diagram ? thx

repairing a power supply do not need a diagram often faulty on a power supply are the regulator transistor,capacitors,resistors,and diodes. just check these parts and you can fix the power supply.check also for loose contacts and connectors this also cause a fault on the power supply.

Jan 18, 2011 | NetGear ProSafe JFS524 24-Port Ethernet...

1 Answer

Does not power up, red light next to on/off button just flashes. I rebooted the tv and it still has the same problem.

Some of the secondary voltages [low voltages of 12V and 8V], either one among the said is missing inside the circuitboard of your TV. It may be due to a component [Regulator] mistake, or loose sodering joints. You just give a mild hit with your palm, on the cabin of the TV while it stops. Do not hit it with any hard material. Use your palm only for this. If Tv comes alive again; it means that there is a loose contact inside the main board of the TV. Just find the exact point, and resolder it. If this doesn't help, check for the low tension voltages. As the red light flashes, means 5V power supply inside your TV is ok. Check the other two and the main supply rail, normally 125VDC, and related componets fitted with it. There may have a small value resistor in series with this power supply rail to LOT [usually less than 2 Ohms or so]. It will generate a small amount of heat while working. Check its sldering contact also for loose contact.

Oct 18, 2010 | Toshiba 32HFX71 32" TV

1 Answer

Lots of problems please help!

  1. firstly you check the cable loose/break,
  2. check it by using multimeter
  3. dry soldering, loose contact
  4. resolder soldering points or reconnect cable
  5. your powersupply transformer coil may breaked now it become loose contact.
  6. you check the supply output voltage with and without load
  7. if low or no output voltage replace supply
  8. if you don't get the proper transformer rewind it
  9. also check power amplifier section short ckt

Jan 17, 2008 | Cyber Acoustics CA-3550 Computer Speakers

1 Answer

Monitor turn on &off intermittently

there is a loose contact in power supply. 1 check for plug or socket loose 2 switch intermittent 3 fuse loose. 4 any connector loose. 5 any component in oscillator looseor print break. 6 swiching transistor print loose. 7 main filter capacitor loose or dry. hope this will help.

Oct 08, 2007 | LG Studioworks 563N 15" CRT Monitor

1 Answer

Proscan 27" tv

it is due to power supply failure. 1 check for loose contact in power supply. 2 it might be due to plug or socket loose. 3 switching circuit failure in power supply. good luck.

Oct 07, 2007 | Proscan PS27500 27" TV

1 Answer


loose contact or sparking in mains supply. plug or socket loose. if it is ok then problem in power supply. it might be due hor. output also if supply is ok.

Sep 29, 2007 | Apex Digital AT2002S 20" TV

1 Answer

Sharp color television

stand by power means your tv is connected to mains but power not reaching to circuit. 1 please check power supply. 2 if it is ok check for horizontal section. 3 loose contact &loose connector. good luck

Sep 28, 2007 | Televison & Video

1 Answer

Monitor is blank, power is on

it was on after it went blank & again on means there was a loose connect as it came back on. but now that loose contact has got permanent due to print breack or track open. the problem is in 1 monitor to computer connector not properly connectec. 2 crt base loose 3 track open or print in power supply. 4 if it is ok check for horizontal section print or loose. hope this will help good luck. 1 power supply print b

Sep 28, 2007 | Gateway FPD2275W LCD Monitor

1 Answer

Panasonic TV Problem

1 there is a loose contact in plug or socket. 2 there ia problem in power supply (loose contact) 3 if it is giving ok output then go for 4 check hor section for loose contact.

Sep 23, 2007 | Panasonic CT-32D11 32" TV

1 Answer

Zenith big screen

sound is ok means power supply is ok. as there is no picture there is a problem in video or luminance section. 1 check chroma ic supply 2 check signal line to video section 3 loose contact in video section 4 crt base loose 5 crt supply 6 no supply to g2 7loose contact in brighness line

Sep 16, 2007 | Televison & Video

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