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#1 |
Senior Member
Join Date: Oct 2009
Posts: 121
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![]() Samsung s23a300b led lcd. Turns on fine and shows picture about no signal detected, able to get into menus and everything looks fine.
When a vga or dvi signal is plugged in the screen shuts off and no video is displayed at all. After cable is unplugged you get standard message about signal or it switches between digital and analog input message. Has anyone seen this before. Last edited by knoxrebel; 06-06-2013 at 01:38 PM.. |
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#2 |
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![]() Is there another chip under that metal plate ? The problema description seems much similar to problems of the 710n series where the problem is in the microcontroller .
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#3 | |
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Join Date: Oct 2010
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![]() Quote:
You'll find a link to the firmware reflash software in the second thread. Download, install and run it. More specific details on how to go about are in the first thread. I speak from own experience, about a month ago I bought a 'defective' 27SA550 that showed the exact phenomenon you described and managed to revive it by simply reflashing the firmware. Amazingly it was not even 1,5 years old. It's been working great ever since. re-atari Last edited by re-atari; 06-06-2013 at 03:53 PM.. |
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#4 |
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Join Date: Oct 2009
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![]() After installing drivers firmware update utility started the update. It restarted about 20 times going from 0-10% and then would not progress, i assume the computer restarted and now monitor does not power on and firmware utility no longer sees the monitor although windows does. Any suggestions?
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#5 | |
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Join Date: Oct 2010
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![]() Quote:
Did you use a VGA or a HDMI cable? Did you dowloaded the correct software, I recall Samsung had individual update software for every model affected. Otherwise, I'm out of ideas. I fear desoldering the firmware IC and checking/programming it on a standalone programmer will be the only option left. That and buying a new/replacement board, of course. re-atari |
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#6 |
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Join Date: Oct 2009
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![]() If i need to use a programmer to get flash chip that is okay as i have a hot air smd station and a programmer. Not sure where to get the firmware though as it is packed in an executable. Also, if i can get mine working using this method it wont be much more work to flash several more in case other members need one.
I used the vga cable and i believe that I used the correct software. |
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#7 | ||
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Join Date: Oct 2010
Posts: 102
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![]() Quote:
![]() You could try dumping the desoldered flash chip and program its contents in a new one. Or maybe, just maybe, you might get away with replacing the flash chip with a completely blank one and programming it with Samsung's reflashing software. It will probably be a smd 8-pin serial eprom, AFAIK sockets for smd flash chips are not available. That's just too bad, as it would make experimenting a lot easier. Quote:
I already took a look inside the reflash software after I had scuccesfully revived my 27", but couldn't detect any files in it. It wasn't a zip-, rar- or any-of-that-kind sort of file. I think I got the software from Samsungs EU website, I'll check it out for you and download the software for your monitor. I don't know if it's just one big program that can be used to update all of the affected monitors. re-atari Last edited by re-atari; 06-07-2013 at 02:14 PM.. |
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#8 | |
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Join Date: Oct 2010
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![]() Quote:
You could try to download the software again, just to make sure it wasn't corrupted during transmission. If that doesn't help, more drastic measures with your soldering station will be inevitable ![]() re-atari Last edited by re-atari; 06-07-2013 at 02:53 PM.. |
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#9 |
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Join Date: Oct 2009
Posts: 121
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![]() The odd thing is that software no longer sees the monitor and it wont power on at all anymore. Windows sees the monitor in display options thought. Was hoping that someone would have a bin file or one would be available on ebay. No luck so far.
I did open the exe with 7-zip but I didn't see anything of use. |
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#10 | |
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Join Date: Oct 2010
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![]() Quote:
![]() One of the forum users in the thread I mentioned in post #2 (Tibimakai) wrote that he had bought a replacement board for his 23A550 at a cost of $ 39.95. Maybe his source has replacement boards for your monitor as well. If you have a chance, post hires photo's the component and solder side of your board. I'm sure someone in this forum will be able to help identifying the flash chip. re-atari |
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#11 |
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Join Date: Oct 2010
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![]() BTW: here is the service manual for your monitor. It deals with every type in the SxxA300B series, ranging from 19" to 24". Looks to me it will come in handy.
re-atari |
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#12 |
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Join Date: Oct 2009
Posts: 121
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![]() Looked at the manual and i tested ic 601 and 602 and have voltage going in and out. Is there a way to manually power this unit on so it can be reflashed?
Im stuck at this point |
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#13 | |
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Join Date: Oct 2010
Posts: 102
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![]() Quote:
BTW: the 'switches' are of a capacitive type, which I find a bit fiddly to react. You really have to swipe your finger at the right place for the monitor to switch them. But I'm sure you have already tried everything you can to get it to switch on, so I probably can't help much further... From the schematic I can't determine if Samsung's flash updater only rewrites the EDID data stored in the 24c02 eeproms, or rewrites the flashrom. If the latter is the case, the controller on the mainboard needs to function properly, as it has to pass through the data that will be written onto the flashrom. It's just a thought, but the description you posted earlier seems to indicate that the flash updater could not succesfully write the first block of data onto the flashrom. This could be due to a FUBAR-ed firmware or a (hardware) defective controller. I'm afraid it looks like getting hold of a replacement mainboard is the only option left to revive your monitor. That would also give you a source to known good firmware (flashrom) and EDID data (both eeproms), for experimenting with reprogramming the respective components on your defunct mainboard. re-atari |
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#14 |
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Join Date: Jun 2013
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![]() Sorry to resurrect. I have a very similar problem. S23A300B, powers on, displays the no signal screen. As soon as you plug in a source (DVI in my case) it shuts down. My PC still sees it as a monitor though. I downloaded the updater, but it says the firmware is already updated or doesn't need it.
Has anyone figured out the hardware issues here? On fleaBay I see I can buy the 8 pin IC that has already been flashed. Think this will do it, or has another solution arisen that I can't seem to find? Cheers, Alex
__________________
Ask me about the stuff I've fixed: Sony 52w4100, Sony 46bx420, LG 42PC3D, Samsung 32D430, Sony 40xbr800, Sony 36xs955, Vizio GV47L, Sharp 46D64U, HP DV6-3225dx, HP DV4-1225dx, Gateway LP2407, Samsung pn59d7000, Samsung 55D6450, Gateway NV78, HP 2509m, Sony 40V2500, Vizio VP504, Magnavox 47MF437B, Samsung S23A300B, Razer Kraken headphones Help me with the stuff I'm working on: NEC Turbo Express, NEC Core2 CD-Rom2, Goldstar 3DO, Phillips 47pfl7403d/27, Pioneer VSX-40 All thanks to the folks on this forum! |
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#15 |
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![]() bump, any ideas?
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#16 |
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![]() Nothing?
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#17 |
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![]() Ok, SOLVED, the pre-flashed IC from ebay did it. Please see the link I post 3 posts up if you are having the same problem. To try and solve this I would first try and update the firmware yourself, and if that doesn't work, get the 8 pin IC from ebay and solder it in yourself.
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#18 | |
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#19 |
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![]() Sorry, this was like 6 years ago. I remember nothing about doing it at all. Still have the monitor though.
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#20 |
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![]() just google SA300 firmware and DL it from samsung
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