Hello, I have some news, due to the continuous strikes of the post services here in Belgium, I just received the chips yesterday from Amazon. Cheap and I ordered 5 and I got 8 .... by the way I doubt all of them are really working , you know what I mean.
Anyway, the first one I tried, was flashed with success and the TV set is now working fine just replacing IC4104.
Thank you again for your help.
yoritomo
Senior Member
Last Activity: 04-09-2025, 05:52 AM
Joined: 09-09-2012
Location: charleroi
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Yes sorry, you are right, I was watching in the schematic, there the number is not the same, but on the PCB the IC number is matching.
I will come back with some news when I will receive the small chip.
Have a nice day .Leave a comment:
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Thank you so much for these dumps, may I ask where did you find it ?
I wanted to flash IC1404, but it is not even readable or detectable by the programmer, the chip is dead I will order a new one, I don't have it in stock or salvage unluckily.
The number of the NAND chip number does not match with the number of the file you sent.Last edited by yoritomo; 01-26-2025, 05:17 AM.Leave a comment:
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Yes but I don't have any more good sources for dumps, before I had a pro subscription to Euras services, but it is finish now. I could not find it in download,Leave a comment:
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Hello
Thank you for the replies, yes sorry, there is the link to the schema below. The power supply works fine, but the processor never orders the main power to start by the POWER_ON pin.
[url]https://elektrotanya.com/showresult?what=kdl-37ex402&kategoria=&kat2=all[/url]
Be careful in this schematic, it is a bit weird the main chip is diplayed in many pages in it's different sections.
I have some new informations, I have been in the wrong way due to the malfunction of the test lead of the oscilloscope, actually the processor is running, I...Leave a comment:
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Sony KDL-37EX402 the TV in dead, no LED, motherboard problem.
Hello
The TV does not show any sign of life , I started the troubleshoot as this , no power Led, no reaction when pressing the power button.
I checked the Power coming out from the power supply, the 3.3V_standby is correct and steady, then I checked the 1.2V_standby produced by IC6001 which Is good as well.
So I decided to control the main IC , IC4000 , he does not output any oscillation on the Xtal, Then I am now bloacked there.
The schematic is downloadable at Eletrotanya website , the schema is weird because the processor is not represented... -
I finally found what was the problem, that is weird. I found a non polarized capacitor , C654 which was normally 22nF which dropped to 4.5nF which caused that the power could not insure to supply the correct tension for the chip IC652, a cmos 4013. After replacement with a 400V equivalent , everything works normally again. That was the reason the reset circuit was dizzy , also the relay was not working.
​[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"Yamaha RX-V659.png","data-attachmentid":3537156}[/A...Leave a comment:
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Yamaha RX-V659 the processor does not run but looks alive.
Hello everyone.
I am facing a problem with the processor of this amplifier, in normal condition it is not oscillating, when I set the reset pin low (normally high) the processor is oscillating normally after disconnecting the reset circuit , when releasing it comes high again and the processor stop oscillating.
All power lines looks ok, VSS also, I am not so clever in processors and micro-controller topics, but I have solid experience in electronic repairs.
The schematic can be found here on the website of Electrotanya [url]https://elektrotanya.com/showresult?what=rx-v659&kategoria=All&kat2=All[/url].... -
Re: Asus vivobook 17 x712f
Thank you hoaca388, i tried this dump but it did not work at all.
After burned and verified ok, the computer did not even want to power on. Looks dead. I restored the original BIOS to verify, no hardware damages.Last edited by yoritomo; 10-19-2023, 01:51 AM.Leave a comment:
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Re: Asus vivobook 17 x712f
Thanks for your reply , i write then all the information below :
Model X712F
SN: 24M L5N0CV19X012228
Motherboard :Asus X512FF Rev 3.1
Thanks a lot.Leave a comment:
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Asus X712F
Hello
This computer is blocked with the BIOS password on boot, the procedure with Alt+R does not work on this model, then I of course watched other topics about this computer in this forum , I tried the dumps proposed without success.
Please can anyone fix the original dump to reset the password ? I joined it .
Thanks for you help....Leave a comment:
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Re: Samsung UE50HU6900SXXN
hello
No one has this firmware ?Leave a comment:
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Samsung UE50HU6900SXXN
The TV is on boot loop, only the smart logo is showing, then the screen remain blank with backlight for some seconds and then it is restarting.
It has been some dry joints in the power supply board, i fixed them, capacitors are good, coming out from it , the 5V is steady, the 13V is at 12.75V and is dropping to 2.95V always, I am not sure if it is a switchable power or not.
I guess the problem is coming from a corrupted firmware in the EMMC but I could not locate a dump to try, the chip is a KLM4G1FEAC-C031, I would not be pleased to replace that BGA chip neither... -
Re: SAMSUNG UE55MU6405 - no standby
Which device do you recommend then ? Or may it exists an alternative software or patch for it ?Leave a comment:
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Re: SAMSUNG UE55MU6405 - no standby
Yes I know, but even from official spare parts providers I could never grab any correct Samsung Nand chips without any bad blocks, I tried to use the three method to override bad block, but no success ... with the same software as you showed for RT809HLeave a comment:
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Re: SAMSUNG UE55MU6405 - no standby
Wow thank you so much, now it is working fine, I did not know it needs to be protected, is it sometime the case for Nand chips too ? Because I failed them always ...Leave a comment:
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Re: SAMSUNG UE55MU6405 - no standby
Thanks for the dump, but looks like something else is wrong, still be no reaction from the stand by LED, the processor keeps cold as well as RAM chips, no POWER_ON signal going to the power supply, I could find 1.8V on the power button, and 3.3V is coming to the IR module.
I don't know which is the vital power supply in stand by mode on this motherboard.
Pins 1,7 and 8 are powered with 3.4V at IC1604
Anyone as a clue ? As usual with Samsung no schematics for this board ....Last edited by yoritomo; 03-07-2023, 07:35 AM.Leave a comment:
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Re: SAMSUNG UE55MU6405 - no standby
Thank you for the reply
This is mine, may I ask what are you modifying ?...Leave a comment:
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Re: SAMSUNG UE55MU6405 - no standby
Hello
Same problem with UE55MU6225WXXN , I could not find the dump for the eeprom IC1604 anywhere, please anyone can find it ?
Thanks you very muchLeave a comment:
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Re: RT809H External QFP48
Hello
This post i suite old already, i know ! But i would like to add some information as update for readers, This chip is especially used on Samsung mainboard and Samsung enables some connections to flash this chip onboard.
Then to be brief, using the ISP port of RT809H connect the blue and grey wires to SDA and SCL and the black wire to GND of the mainboard, power the main board with its power supply, and that is done, the programmer can access the chip to do anything as necessary.Leave a comment:
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