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No power, no picture

No dc power, led lights, or picture

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Hi if the tv is totally dead this could be the fuse inside it might have blown, glass type if it has and you replace it and it blows again then there's dead short on the power board somewhere hope it helps

regards
shaun

Posted on Jan 05, 2014

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Posted on Jan 02, 2017

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1 Answer

Samsung UN65EH6000FXZA (Version YH02)


There is three possibilities:
1. Defective back lights LED strip.
2. Defective LED driver section integrated in the main power supply.
3. the main board.

How to check it:
1. You need a LED back lights tester to check the strips, or open the panel, use a 3.7 V DC power supply to test each LED diode separately.
2. Use a multi meter to test the out put DC voltage from the connector to the LED strip between the + & - for each section, (like 1+/1-, 2+/2- etc.) it should read 140 - 220 V DC. (need power up the TV).
3. Un-plug the cable between the main board & the power supply, power up the TV, if you get the back lights light up, the main board is bad.

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If you hold a flashlight up to the screen do you see any image or video

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The scanner portion of this 815mfp will not power up when plugged in. Turning on the power button does not show any lights on the users control panel at all.


Hello,
This problem sounds like the DC power supply has failed - in particular the 5VDC. The LEDs and logic all run on 5 volts. Try replacing the DC power supply Designjet 815mfp Power Supply

Feb 24, 2016 | HP DesignJet 815mfp InkJet Printer

1 Answer

Nec np-m260


be more specific. no power? no image? no light? if there is no led lit, power supply problem. if the led is on but the fan doesn't turn on when the power is pressed, either the dc fan is seized or a board level fuse is blown. if the fan won't turn on, usually the light won't either. if the fan is on but not the light, the lamp may be blown. if all is on and no picture, check your inputs.

Mar 02, 2014 | NEC Office Equipment & Supplies

1 Answer

I have a herritage t101, it displays the Ls error and has no drive whatsoever but was working a few month back


The SCR lower board is designed with diagnostic LED lights. The LED's are color coded according to
their specific function. Green indicates a properly operating treadmill; the green lights should always
be ON when power is supplied to the treadmill. Yellow indicates a treadmill function. Red indicates a
treadmill malfunction. Here is a list of each LED and what it signifies:
MOTOR (yellow) - The MOTOR LED illuminates when dc (direct current) voltage is sent to the drive
motor. The LED gets brighter when the dc output is increased.
RLC (yellow) - The RLC (R = Reactance / L = Inductance / C = Capacitance) LED illuminates when
the filtering system is properly working. The filtering system includes the capacitor and filter choke. If
there is a short in either component then the RLC light will not come on.
DN & UP (yellow) - The DN and UP LED lights tell us if the elevation DN and UP relays are
functioning properly. When the LED lights, it tells us that the relay has energized and is sending high
voltage (110vac or 220vac) to the elevation motor.
AC PWR (green) - The AC PWR (Alternating Current Power) illuminates when AC line voltage is
delivered to the treadmill. It then passes through the in-line fuse (110)/s(220) and lights the AC PWR
LED.
+12V (green) - When the proper AC voltage is delivered to the treadmill, passes through the in-line
fuse/s, through the full wave bridge rectifier (changes AC to DC), through the transformer (steps down
DC to +12vdc) then the +12V LED lights.
This the board LED, who control the signal for Main Motor+Elevation Motor. You must see, the LED DN+ UP( both will be Lit) in any position down or Up.
2) The RELAY board is designed with diagnostic LED lights. The LED's are color coded according to
their specific function. Green indicates a properly operating treadmill; the green lights should always
be ON when power is supplied to the treadmill. Yellow indicates a treadmill function. Red indicates a
treadmill malfunction. Here is a list of each LED and what it signifies:
AC PWR (green) - The AC PWR (Alternating Current Power) illuminates when AC line voltage is
delivered to the treadmill. It then passes through the in-line fuse (110)/s(220) and lights the AC PWR
LED.
VDC (green) - The VDC LED will light when it receives DC voltage from the DC power supply.
DN & UP (yellow) - The DN and UP LED lights tell us if the elevation DN and UP relays are
functioning properly. When the LED lights, it tells us that the relay has energized and is sending high
voltage (110vac or 220vac) to the elevation motor.
UPSW (green) - This LED will illuminate when the low voltage dc is delivered from the upper display
board to the elevation UP relay. This low voltage dc is what energizes the coil of the relay.
DNSW (green) - This LED will illuminate when the low voltage dc is delivered from the upper display
board to the elevation DOWN relay. This low voltage dc is what energizes the coil of the relay.
BELTSW (green) - This LED will illuminate when the low voltage dc is delivered from the upper
display board to the belt (motor start) relay. This low voltage dc is what energizes the coil of the relay.
SPD (yellow) - The SPD LED flashes on and off (relative to speed) when the speed sensor is
operating properly.
PWM (yellow) - This LED will light when the upper board is sending a speed signal to the PWM.
Both the PWM LED and BELTSW LED must be lit for belt movement.
Finally this this Relay Board, the Each Led will be Lit, for any Relai control for DN down, or UP elevation motor. Use the contact cleaner, you can find it in R .Shack.
see the diagram attached.
God bless you1_14_2013_9_25_21_pm.png

Jan 14, 2013 | Exercise & Fitness

1 Answer

Samsung 1080 picture glitching on model # HL61A750a1fx2c Versionre01


If it's all colors (Red, Blue, Green) doing the same thing at the same time, there are (unfortunately) multiple possibilities:

1) the AC to DC power supplies
2) the LED Driver Board
3) DLP driver, or DLP itself

The most likely problem is the DC-DC power supplies, which are known to have capacitors that go bad after several years of operation.

Due to this, there are many sources for either re-capacitor kits (DIY), or rebuilt power supplies with upgraded capacitors.

WARNING - Dangerous, and even lethal voltages are present inside your TV set. Do not attempt this unless you are trained in these kinds of repairs. Leave the TV unplugged for several hours (or preferably a full day) before attempting such.

DIAGNOSIS for bad capacitors: If you inspect the large capacitors on the power supply boards, and they are not totally FLAT across the top surface (if bulged at all), then you need a new power supply or new cap's. Likewise, if there is any leakage from the capacitors (usually a light-yellowish crusty appearing substance), they are BAD.

Sub-power supply:
BP96-01726B ASSY PCB P-SMPS Aquamarin,LED DLP TV,DC2

Main power supply:
BP44-01001A SMPS-DLP TV PN082DPS-VF(A),AC/DC,90V-132

A quick Google search for these part number (BP96-01726B & BP44-01001A) will reveal many sources, and pictures to verify it's what your set has.

1_12_2013_7_27_32_pm.jpg1_12_2013_7_27_48_pm.jpg

Jan 12, 2013 | Samsung HL61A750A 61" HDTV

1 Answer

I have a reebok crosswalk rt 5.0 treadmill. I can calibrate the incline and it goes up and down. however when you press the button to raise the incline the incline number will change but the machine does...


Step 1:

see this details and proceed according. God bless you

The SCR lower board is designed with diagnostic LED lights. The LED's are color coded according to

their specific function. Green indicates a properly operating treadmill; the green lights should always

be ON when power is supplied to the treadmill. Yellow indicates a treadmill function. Red indicates a

treadmill malfunction. Here is a list of each LED and what it signifies:

MOTOR (yellow) - The MOTOR LED illuminates when dc (direct current) voltage is sent to the drive

motor. The LED gets brighter when the dc output is increased.

RLC (yellow) - The RLC (R = Reactance / L = Inductance / C = Capacitance) LED illuminates when

the filtering system is properly working. The filtering system includes the capacitor and filter choke. If

there is a short in either component then the RLC light will not come on.

DN & UP (yellow) - The DN and UP LED lights tell us if the elevation DN and UP relays are

functioning properly. When the LED lights, it tells us that the relay has energized and is sending high

voltage (110vac or 220vac) to the elevation motor.

AC PWR (green) - The AC PWR (Alternating Current Power) illuminates when AC line voltage is

delivered to the treadmill. It then passes through the in-line fuse (110)/s(220) and lights the AC PWR

LED.

+12V (green) - When the proper AC voltage is delivered to the treadmill, passes through the in-line

fuse/s, through the full wave bridge rectifier (changes AC to DC), through the transformer (steps down

Step 2:

This the board LED, who control the DC to +12vdc) then the +12V LED lights.
signal for Main Motor+Elevation Motor. You must see, the LED DN+ UP( both will be Lit) in any position down or Up.

2) The RELAY board is designed with diagnostic LED lights. The LED's are color coded according to

their specific function. Green indicates a properly operating treadmill; the green lights should always

be ON when power is supplied to the treadmill. Yellow indicates a treadmill function. Red indicates a

treadmill malfunction. Here is a list of each LED and what it signifies:

AC PWR (green) - The AC PWR (Alternating Current Power) illuminates when AC line voltage is

delivered to the treadmill. It then passes through the in-line fuse (110)/s(220) and lights the AC PWR

LED.

VDC (green) - The VDC LED will light when it receives DC voltage from the DC power supply.

DN & UP (yellow) - The DN and UP LED lights tell us if the elevation DN and UP relays are

functioning properly. When the LED lights, it tells us that the relay has energized and is sending high

voltage (110vac or 220vac) to the elevation motor.

UPSW (green) - This LED will illuminate when the low voltage dc is delivered from the upper display

board to the elevation UP relay. This low voltage dc is what energizes the coil of the relay.

DNSW (green) - This LED will illuminate when the low voltage dc is delivered from the upper display

board to the elevation DOWN relay. This low voltage dc is what energizes the coil of the relay.

BELTSW (green) - This LED will illuminate when the low voltage dc is delivered from the upper

display board to the belt (motor start) relay. This low voltage dc is what energizes the coil of the relay.

SPD (yellow) - The SPD LED flashes on and off (relative to speed) when the speed sensor is

operating properly.

PWM (yellow) - This LED will light when the upper board is sending a speed signal to the PWM.

Both the PWM LED and BELTSW LED must be lit for belt movement.
Finally this this Relay Board, the Each Led will be Lit, for any Relai control for DN down, or UP for elevation Motor. You must clean contact of the Relay with Special Spray(Radio Schack).

With this you must fix it.

Jan 07, 2013 | Reebok Exercise & Fitness

1 Answer

My click botton to take the picture doesnt work, idk how to actually take the picture, am i doing something wrong??


When you connect the power adapter into the laptop, does the power LED light up? If not then - The battery adapter or the adapter's power lead or the laptop's power socket could be faulty. Check power adapter's DC plug that connects into the laptop power socket with a multi-meter, the voltage should be slightly higher than the voltage that is printed on the label on the bottom of the adapter. If the voltage is zero or way below the voltage that is printed on the label then the power adapter is faulty and needs to be replaced. If the adapter is OK then connect it to the laptop and power it up, then look at the power/battery charging LED light and wriggle the power plug in the laptop's power socket. If the power/battery LED light flashes and in a certain position this LED light stays firm, then the power socket is either faulty or it has a dry solder joint where it is connected to the motherboard. This can be repaired but it requires the laptop to be completely dismantled to get at this power socket and repair. If you cannot DIY then I suggest you get a quote first.

Aug 14, 2012 | ASUS Computers & Internet

1 Answer

No picture


try resoldering vertical output ic pins, no vertical deflection will shut off picture. may need ic replacing along with electrolytic cap.

Apr 22, 2008 | JVC AV-32260 32" TV

1 Answer

JVC AV32260G COLOR TV


try resoldering vertical ic pins

Apr 19, 2008 | JVC AV-32260 32" TV

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