Re: Memorex MLT4221P stuck in standby
We just had a discussion on this subject and YES it matters depending on the make and model of the multimeter. If the battery low icon is showing, you could be getting incorrect readings (like my new old used Fluke 27). I suggest you put in a new battery and remeasure.
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Memorex MLT4221P stuck in standby
with active inputs to vid2, svid & YPbPr2, powering the tv gets the standby ring to go red. but pushing power or any other button on tv (i dont have remote) changes nothing - red ring, no audio or video. a flashlight has no effect on the screen (no menu or anything). so i popped off the back cover to have a look.
all the caps look good/flat & i didnt see any evidence of leakage or burning. fuse F1 on power supply tested good, with power on have 120v thru the fuse.
i took voltage readings from the p/s - pic 1 (my multimeter battery is a bit weak, not sure of any effect):
cns1 - yellow 5v - red 4.6v (0/F)
cns2 - brown 11.8v (18v)
cns3 - blue & red 24v
cns4 - red 24v
hopefully the low reading @ 18v will lead to a simple solution. i dont have tech beyond a multimeter to test components. so i guess i'm a tinkerer, not anything more, and hoping your ideas will bring some alternatives for a solution. pics 2 & 3 are of the mainboard.
thanks for your help.Attached Files -
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Hello
I have an TV Led 4K Selecline 65s18 with mainboard T.MS3458.U801
The TV is faulty with stuck in Standby RED LED. Can't power the TV.
Before this problem , the TV stuck the picture with artefact , i unplug the AC cable and since the tv is stuck in standby .
All voltage are OK on PSU and main board for regulator. I tried flash firmware 25Q64 with many dumps
But the voltage on power button is 0.6V not 3.3V. When i press power button the voltage up to 0V. I tried to add 5V with Power Supply on 5V_STB and 3.3V on Power... -
Hello to all friends of the forum and well found, here I am asking for your help and sorry for my translated English.
As per Hisense tv title LTDN50K220WSEU stuck in standby
PSU rsag.820.5687 HLL 4855WF
Main rsag 7.820.5842
I enclose the psu diagram, after the first routine checks I find myself with a regular standby voltage of 3.3v blue light on steady when the power button is pressed nothing happens, psu disassembled and bench checked ... forced ignition by sending a signal 3 , 3v on the SW and PWM2 pins the psu turns on and delivers all the voltages... -
Hi. I have the following problem with my TV. After connecting to mains, the standby led (red) turns on, but TV is not responding to remote control or buttons on TV. After some measurements, I found out that +5 V standby voltage is present, but I dont have ON/OFF signal coming in to turn PSU on. It stays at zero volts. After looking at the schematic of the mainboard, I should get ON/OFF signal coming in at the R1402 resistor, but it stays around +3,5 V. So I removed it and I was able to turn on TV with buttons on TV, but not with remote control.
What could be the problem ? Thanks...01-21-2024, 03:39 AM -
Hi techs, I have a Samsung ua39eh5003r which switches on and then goes to standby. I have to wait for a day or two for the tv to switch on again, all the time it is stuck on standby. I have checked the voltages on the power supply board on both occasions when it is on and off and these are my findings:
Connector CNM803:
TV ON
Pin1,3,4,5(Vamp),7(Vamp)- 12.6V; Pin2(PWM_DIM)- 0.96v; Pin6(BLU_ON/OFF)- 4.41v; Pin8,9,10- grnd; Pin11,12,13- 5.16v; Pin14(Power ON/OFF)- 3.3v
TV OFF
Pin1,3,4,5(Vamp),7(Vamp)- 12.6V; Pin2(PWM_DIM)- 0.06v; Pin6(BLU_ON/OFF)-...09-18-2021, 11:51 AM -
When the Main board is disconnected, the back lights are off but tapping on the chassis makes them light up and all voltages are then good. Connecting the main board up makes the TV work normally until moved. LED INERFACE STRIP BN41-01971A has a short on the first 2 pins on the left of the picture, the cable tests good. All the other pins and all LED strips test good. Is there an easy way to fix the short or do I need a new interface. Any help would welcome.
PSU number bn44-00610A L46SF_dpn
1 B13v 12.4
3 B13v 12.4
5 Vamp 12.4
7 Vamp 12.4
9 GND...
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