Re: Samsung B2030HD IR Remote Receiver Dead, shorted micom?
Ok that's fine, I am aware that the micom logic/software and the system fw are completely separate and I appreciate the explanation your giving to us all but how does this help? Yes i did update the FW right at the beginning because it's quite a normal thing to try when you get a fault and there are no obvious hardware issues found (for me anyway). It may have not been the most clever or logical thing for me to do first bearing in mind that bad IR points more to the micom, but how many times have we had a device that didn't...
jesterace
Senior Member
Last Activity: 03-27-2024, 01:43 AM
Joined: 08-01-2013
Location: Lincolnshire
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Re: Samsung B2030HD IR Remote Receiver Dead, shorted micom?
I love it when someone knowledgeable comes along just to observe and laugh. Fear not, I wouldn't lower myself to ask you for any help in case I get more Diah-rhea back.
For the record, I didn't need to do a micom dump earlier than I have done because I had another board on hand that had a working micom to transplant over, albeit from a version of this TV that has a slightly bigger panel - and I'm not as clever as Diah-rhea in knowing if the micom from a bigger TV (but same mainboard) would have...Last edited by jesterace; 11-14-2022, 02:25 AM.Leave a comment:
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Re: Samsung B2030HD IR Remote Receiver Dead, shorted micom?
more updates, the plot thickens!
I decided to grab the original old (supposedly bad) micom ic and put it onto the other mainboard I have (that i bought from a tv that was dead but was 2 inches different size). Before i fired it up i did a hex compare of the IC with the downloaded DUMP off the internet...they match! so this can't be a micom corruption fault after all. My micom must be fine.
I put the cannibal mainboard in my tv with original micom from my tv and the remote worked straight away....Leave a comment:
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Re: Samsung B2030HD IR Remote Receiver Dead, shorted micom?
I came to try and get a dump of the micom this morning with rt809h but the tv would not respond to remote at all. Only the front panel again. Oh no!
I managed to get a dump anyway, then checked the PSU and all caps test good with ESR meter and no bloating.
I tried flashing the dump back just to test the writing but after that the TV DEAD. So, I took out mainboard and powered it from 5v bench supply (incase the TV standby isn't stable) and flash again but with a correct dump i found online (finally!)....Last edited by jesterace; 11-13-2022, 05:17 AM.Leave a comment:
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Re: Samsung B2030HD IR Remote Receiver Dead, shorted micom?
UPDATE: I managed to locate a dead TV with similar board, same model number of main board but size of tv 2 inches different. Swapping the whole main didn't work as it gave me a black image, I guess because of the size difference. So...I swapped over the MICOM ic to mine and the TV started to respond to the remote again! However, when the TV cools down it stops. responding (like when the TV has been off for a while). Only way I can get the TV to respond from a cold turn on is to leave it on for 5mins or so and then try the...Leave a comment:
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Re: Samsung B2030HD IR Remote Receiver Dead, shorted micom?
Ok thanks i may give that a try.Leave a comment:
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Re: Samsung B2030HD IR Remote Receiver Dead, shorted micom?
I have an rt809h which should be able to do it via vga port i think, but without a bin can't do anymore i guess. It does show VGA programming of sub micom possible through vga in samsung service manual.Leave a comment:
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Re: Samsung B2030HD IR Remote Receiver Dead, shorted micom?
Tested all components on signal line on main board from connector to micom, nothing shorted and no low resistances. Injected 3.3v into front panel board on its own and measured signal line with oscilloscope, ir codes showing up perfectly when pressing remote. So dead micom IC or corrupted firmware? I guess nobody knows where I may be able to get a bin file for this by any chance?
Thanks for all the help,
James.Leave a comment:
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Re: Samsung B2030HD IR Remote Receiver Dead, shorted micom?
Good question actually, i guess i should just see if its the remote board that should keep the line high or if thats done on the mainboard... i'll report back!Leave a comment:
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Re: Samsung B2030HD IR Remote Receiver Dead, shorted micom?
Signal line is still low even when IR board is removed so guessing its not the ir board itself?
Thinking more along the micom firmware but can't find any, hunted high and low. Maybe someone here has a copy?
Remote is 100% good, tried with phone IR blaster too and confirmed with camera.
James.Leave a comment:
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Samsung B2030HD IR Remote Receiver Dead, shorted micom?
Hi,
I have this TV a small 20 inch that works perfectly except for the IR has stopped. I have confirmed that the remote control is fine and tried an alternative and even tried with IR blaster from phone. Remote 100% ok.
Tried installing latest firmware but no change.
TV won't respond to remote at all, not even to bring it out of standby. I have to use the touch sensitive front panel to operate, at which point TV is usable albeit with no remote.
Tried replacing the IR receiver diode/bulb on front panel and no change so put the old one back. After tracing... -
Re: lc-49cfg6021k logo loop
Ordered another board today. Hope it fixes it. I would have liked to have tried flashing the nand but I cant find a dump anywhere. If the 2nd board works i'll consider taking a dump of it! I'll update when the 2nd board arrives if it helps anyone.Leave a comment:
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lc-49cfg6021k logo loop
Hello,
Got this TV that originally had the fault of being difficult to come on, i.e. stuck in red light standby. If it did come on, the light would go white but show no picture. Then after some time it would go back to red.
Tested all PSU voltages. 5v, STB and 12v all present and look stable.
Found a mainboard for 30quid so at that price it's not worth messing around. Fitted the used board which was supposedly working, and now it does show the sharp logo for about 30sec but then goes off and reboots showing the logo again.
Would you still be... -
Samsung Plasma PS60E530 no image, slow blinking green led
Hello,
Trying to figure out what might be wrong with this plasma tv. It gives no image at all, not even a flash. No sound. The status led on the inside of the tv blinks very slowly. Maybe once every 5 or more seconds (which i understand indicates a fault causing shutdown).
I tested the main voltages which came out as follows:
VA: 57v (Panel states 57v)
VSC: -45v (Panel states -200)
VS: 213v (Panel states 211v)
VE: 139v (Panel states 105v)
I tested the VSC at a capacitor on the Y MAIN board labelled VSCAN but i'm not sure... -
Panasonic Vierra frequent EEPROM corruption
Hello i had some trouble with a Panasonic LCD TV a few months back and after a lot of trying i figured out that doing a factory hard reset cured the problem. The TV originally wouldn't come on and kept flashing it's red LED.
PANASONIC TX-LR32C3
Panel: VVX32H100G00
PSU: TNPA5361AA4P
Main: TNP8EA112
I used the following reset sequence:
Turn the TV off.
Hold the F button and Vol- button on the side. Then hold the power button (also on the side).
Wait for 3-10 seconds for the backlight to come on.
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Re: Panasonic tx-l32c3b mainboard fault (FIXED)
In a complete turn around, it looks like it was the mainboard at fault, but not in a serious way! I found some info about doing a factory reset via the panel buttons and the TV is now back to life! Here is what i did:
Turn off the TV.
Hold the F button, Vol- button and power switch on the side panel.
Hold breath and wait for the backlight to come on.
Fixed!
Hope this helps someone.
James.Leave a comment:
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Panasonic tx-l32c3b mainboard fault
Hi i'm looking at a PANASONIC TX-L32C3B which won't turn on. It has a solid red light and will only flash in response to using the remote control. It is not giving any flash codes on it's own.
All voltages are present on the PSU board (5vsb and 16v) however i saw that the INV_SOS pin was high (3.3v). In addition, i also saw that the INV_ON signal was low (0v).
To try and prove that the PSU is not at fault, i injected 3.3v into INV_ON and found that the INV_SOS error disapeared (0v). Great! I had to also inject 3.3v into the INV_PWM input of the PSU too to make the backlight...Last edited by jesterace; 02-08-2018, 12:21 PM. -
Re: Vestel 17pw06-2 made some smoke
This will make it a teaser then. Main board must be ok because it all turns on fine with another good PSU
Last edited by jesterace; 02-04-2018, 05:06 PM.Leave a comment:
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Re: Vestel 17pw06-2 made some smoke
Went ahead and tried to narrow down the 12v fault a bit more while keeping L304 soldered in. I removed IC401/IC400 (this board only has a 5v circuit, no 3.3v). Removing those IC's made no difference. So then i tried disconnecting the +12VCC trace entering Q402/R435, but also no change. Tick tock again.
After exhausting those i think i was only left with VCC_AUDIO which takes a feed from +12VCC near the 12v output diodes. I found a jumper here that i could easily cut. After doing so, the TV will power up without clicking (L304 re soldered)....Last edited by jesterace; 02-04-2018, 11:42 AM.Leave a comment:
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Re: Vestel 17pw06-2 made some smoke
Finally something good has happened. I just removed L304 to see if i can just isolate the whole 12v circuit on it's own. After doing this, the TV doesn't tick tock anymore (i get normal red/green flashing) and the voltage at L301 is a stable 12.3v! I didn't leave the TV on to try and fully start up incase it do more harm than good after removing L304. I just left it on long enough to probe the 12v. Seeing a stable 12v finally is promising!
So now i can be sure the whole 12v PWM creation, feedback etc must be good. Whatever is wrong...Leave a comment:
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