Good afternoon to all of you. First of all sorrybfor my bad English. I have a sharp aquos tv ,and i m dealing this problem. If i leave the power cord disconnected,then it starts normally for one minute approximately. After that the tv restarts and only the touch panel lights working for about 10 seconds and only 1-2 seconds lights up the led panel. After that loop again. No signal lights in center. I think probably is a power supply problem . I can see 5 v ,13.3v in 4 pins . I m a mobile technician and i can follow your instructions if you yave some suggestions. Thank you in advance.
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Re: Sharp aquos lc-40le820e power on problem
What is the power supply board number. Is it DPS-126CP ????
If it is then you need to measure the voltages on connector PD pins 9, 10 and 12Last edited by dick_barton; 04-09-2021, 10:17 AM.Willing to help but I'm no expert. -
Re: Sharp aquos lc-40le820e power on problem
Pin 9 1,20v at the beginning and 3,0v after 2 seconds .pin10 3,05v ,pin12 0,12v. Board is dps-126cp-1 aComment
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Re: Sharp aquos lc-40le820e power on problem
Pin 12 = 0.12V
The Panel Power (PNL-POW) signal derived from the mainboard is not present (missing). PNL-POW switches on Q7909 to provide the 12V for the Panel,
You should be able to press Menu on the remote control and use a bright light shone on the LCD screen at various angles to see the Menu displayed.Last edited by dick_barton; 04-09-2021, 03:03 PM.Willing to help but I'm no expert.Comment
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Re: Sharp aquos lc-40le820e power on problem
Maybe check your voltage regulators also, video example there: https://www.youtube.com/watch?v=ocqnqmBxiqYQuit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.Comment
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Re: Sharp aquos lc-40le820e power on problem
this morning update.After many hours with power cord disconnected ,i plugged this morning and everything works fine for 1 minute.All voltages present.13.3v,5.0v,high voltage capacitors 308volts on stand by and 400+when on.But after one minute ,disaster again.Now high voltage capacitors is 316 volts on stand by ,5,0v present and 13v only for 3 seconds when i press the on button on the remote control.And only 2 quick flashes on central pyramid and 1 longer period led offComment
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Re: Sharp aquos lc-40le820e power on problem
Check all the diodes on the powerboard, meter in diode mode, should get a reading in one direction then reverse meter probes should read 1 or OL if any read strange de-solder one leg and test out of circuit, keep in mind that other components on the circuit can make it read strange while still in circuit. So if any read off in circuit tell us which one/s, then we can check if there's a reason why it might read off.Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.Comment
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Re: Sharp aquos lc-40le820e power on problem
These diode's are shorted when in circuit.(d7717,d7703) Out of circuit is ok. So ,what component should i check; The strange thing,is that. If i power on the tv today ,after a few days off,is working perfectly for a minute. After that lights on-off.Attached FilesComment
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Re: Sharp aquos lc-40le820e power on problem
Some testing there, does seem like a mainboard issue, maybe check the voltage regulators on the mainboard as he is in the video: https://www.youtube.com/watch?v=ocqnqmBxiqYQuit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.Comment
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Re: Sharp aquos lc-40le820e power on problem
So , update. I check the mainboard today ,and i found that. These three capacitors are shorted to ground when the are on circuit. I desolder them ,and they are ok. The short-circuit is coming fro this ic3604. This is the M2303ADN. Maybe a suggestion of equivalent ic;Attached FilesComment
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Re: Sharp aquos lc-40le820e power on problem
See if that's it: https://cdn.badcaps-static.com/pdfs/...4969373d5b.pdfLast edited by nomoresonys; 04-21-2021, 07:16 AM.Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.Comment
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
I have an LG Plasma TV 60PM6700 for the past ~12 years.
In the last ~3-4 months I have been having some issues.- Problem: It started with random picture disappearing (sound still worked).
Frequency: Happened about once a week.
Solution: Had to turn off TV wait a few seconds before turning it on again. - Problem: Then it got worse and the TV started to shut down and when turning on the no picture just sound.
Frequency: Happened about once a week.
Solution: Had to turn off TV wait about 10-20 seconds and turn it on again to solve. - Problem: TV shuts down
- Problem: It started with random picture disappearing (sound still worked).
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When I reflash again the bios of hoaca388 the unit powers on and the unit lives!!! Hooray!! All voltage in the coil 3.3v, 5v and 6.7v indicate charging are all present. including the cpu voltage , EEPROM and GPU voltage the unit is now alive, normal screen booting to windows and log in screen until I power it off. Then the unit never goes on even when pressing the power button in the keyboard.. Voltage reading 19v main , 3.3v VCC in IT8225E-128 and EEPROM VCC 0 volt and the charging voltage 0 volt.
Try to trace the power switch button goin to the power switch IC PU8803 (APL3533AQBI-TRG)... -
hello. i've a ps5 edm-033 mobo w/ no power, lights, but one beep when power pressed. i've hooked to uArt and only error code is 80871001 (DDR4 No Power or Short Circuit). i have a donor board, same model, that does power up, fan spins, blue light, and beeps 3 times, then powers off. it has a botched HDMI port replacement job. so w/ the board i'm interested in, with the error 80871001, i was able to research and obtain voltages of the SSD PMIC. i've attached pictures of the provided diagram by DylanBBK (@d62 on Discord) and my voltages and picture of my board. my question is on my picture... -
I have the above TV. Black screen. Power blinks 2 times. OPC blinks once. Plug in with channeldown/volup. Powers up with solid green power but no light. I removed, cleaned and tightened the screwed on the inverters. I tested plug coming from the power supply to the inverter board when unplugged. INV12V shows 7.4 V DC. INV60V shows 0.1 or something like that. After plugging in the cable I don't get meaningful voltage from either one. (I measured after booting the TV with channeldown/volup.)
Is this a bad power supply? Or am I measuring something wrong.
-Mike
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