So I tried both the suspect board and the replacement
The 12V rails come to life with the 1K resistor on both boards .. I am now assuming the Power boards are fine :/
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
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Hi I only took the Power board out of the TV , thinking it could be fixed , without the need the mainboard . Is there a way to trigger the PS-ON without the mainboard?
I could not find a short yet between the 12V and GND , though perhaps there is once switched on right ?
For the record the repair kit list Perhaps I should check these components for shorts?
[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3213328}[/ATTACH] Hi I only took the Power board out of the TV , thinking it...
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43PUS6401/12 PHILIPS 715G7350-P01-000-002S
So I stupidly volunteered to fix a friend's TV, a Phillips 43PUS6401/12
I have previously fixed TV's before , even replacing cathode rays , not a fun task .. Typically the advent of subpar capacitors inside the early Samsung Flatscreens is the reason I originally registered here
However I digress , the Phillps TV was not switching on , no standby light nothing... So rightly or wrongly ( probably wrong ) I assumed the power board was dead , or a faulty power board .. Upon first inspection, I got the MultiBeeper on it , since I am aware of Ohms law , I checked the regular...3 Photos
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Re: Coil Whine , buzzing, identifying parts R9 Fury
The markings (0.19 uH) suggest they are 190 Nano Henrys if I am not mistaken ?
Any idea where to get these? I only see these in the 100-200 Micro Henry rangeLast edited by 90Ninety; 12-20-2022, 05:37 AM.
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Coil Whine , buzzing, identifying parts R9 Fury
I have an R9 Furty Nano ( R9 2XX IIRC ) that I want to put to use , I got it on ebay for quite cheap but, it has some of the worse coil whine I have heard .
I tried putting a long tube on my ear and hovered it around the card while in use , I cannot pinpoint it . However I my educated guess is , that it the whine is an inductor coil and it is one or all of these in the picture . Does anyone know what part this is and what part I can replace them with .
[ATTACH]282587[/ATTACH]
[ATTACH]282588[/ATTACH]
[ATTACH]282589[/ATTACH]
Perhaps likely is that...
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Re: Crappy Vestel Set Backlight going off randomly
I tried this , though simply putting it in standby for 10 minutes or more , provides a workaround , after this the TV will work seemingly fine for 12 hours or more .
Though since the problem is intermittent , it is a pain to diagnose , since the problem only occurs after much time is passed
Had this TV opened more than a brass drawers now ...
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Re: Crappy Vestel Set Backlight going off randomly
So
I have been studying this further . What I have found , is that there is a pattern as to when the backlights are switched off .
If unplugged from wall , or without AC , the set can be plugged in then turned on and will work for hours without problem
If left plugged in and when used for many hours (maybe also when left in standby) , eventually the backlights will only come on for several seconds .
I put a meter on the LED terminals on the board . The voltage drops...Last edited by 90Ninety; 07-06-2022, 02:09 PM.
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Re: Eeprom dump thread!
Here is the Firmware that I pulled of a replacement board BN41-02528A BN94-10804K for Samsung UE70KU6000 7-" 6 Series TV (for backup) . Its an SPI NOR flash , pulled using a CH341A Chip programmer...Last edited by 90Ninety; 07-06-2022, 09:23 AM.
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Re: Crappy Vestel Set Backlight going off randomly
Hey Chief
Yeah the board is the original, I have another and its also missing solder on the top side pads .
I did already reflow the back of the board , which actually decreased the intermittency of the failure , so you may be onto something...
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Crappy Vestel/Sharp LC-40FG3141K Set Backlight going off randomly
Hello
Model Code Sharp LC-40FG3141K
Firstly perhaps I should save myself the agony and throw this set out ? Then again I hate E-waste , or giving a person further headace in the far east or Agbogbloshie . So I digress to my last hope of fixing this pile of shite , with the dash of hope from your combined experiences
So this set is randomly turning off its backlight ( could be days, hours, minutes or seconds ) , my research suggests this maybe an over current protection , or leaky/faulty LEDS , or a bad LED driver circuit . So I opened it up , stabbed my Multi...
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Identifying 'C34QH' SMD Component Asus ROG Strix H370-I
I had found a supplier of the same board , whom took some pictures of the missing component, the missing component is named 'C34QH' (Picture attached)
I couldn't find anything on Google so , I am back here to try figure out what this is . As shown there are traces that lead to the USB 3.1 ports and Ethernet .
[ATTACH]257824[/ATTACH]...
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Re: Identifying a Missing SMD Component Asus ROG Strix H370-I
You may well be correct . The missing component's pad traces lead to the Intel Ethernet and USB 3.1 slots , the ethernet works full Gibabit , but the USB on these traces runs very slow (others are fine) .
There is continuity between the missing components pads and the WiFi slot, hence my assumption that the non working WiFi Slot , though I may be wrong .
Since I first posted I actually tried another couple of spare WiFi cards in the spare PCIE M.2 Slot, strangely the Wifi Card with less...
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Re: Identifying a Missing SMD Component Asus ROG Strix H370-I
I looked at some similar boards that have the same shape/size component , that run along the same traces ( from M.2 and USB) . On another board (B350 ITX) , it appears it has potentially two of these mystery components . A spare board a ESD Transistor C96CH, these are not available to buy , however there are similar ESD Transistors of the same size e.g 'C96BJ'
Perhaps I should just try this and see what happens
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