That unmarked board is a DFI AD77. It says AD77 on the parallel port. I got triggered by the VT8235, which means that it is a kt400 chipset or later (i have a bunch of km400 and later hw with that southbridge -- that's the kt400 but with integrated graphics). Some googling for images then quickly got me to the same orientation of the ATX connector and the two ide connectors, and then i read "DFI AD77" and actually said "of course" out loud, as i had noted the marking on one of the connectors. Part of the fun of your videos, for me, is this exact guessing game :) I definitely would love to see this one diagnosed. KM400 is the first unichrome on a chipset for amd, i still have my km400 machine sitting under my desk, even though i haven't tried to boot it in a decade. I also plucked a lot of bios write enables for a variety of VT8235 from bios images to add them to flashrom, so this one ticks two boxes with me.
Well done, you got further than me. I was going to suggest removing the northbridge heatsink, I was lead to believe the 8235 matched the kt333 or kt400 northbridge and this would have revealed which.
This is an audio device with 2 beautiful PPM meters for setting and watching the audio output levels. Number 4 is for 0dBm sound level and number 6 is for max audio level for going to a transmitter. Each division is 4dBm level change. Above 6 will cause distortion due to overmodulation. The cards on the back of the meters will be the amps for driving the law for the meters as well as perhaps built in limiters., to avoid over modulating the transmitter. Now I see the transmitter to go with it. Could be a link transmitter for looping into a studio feed for external broadcasts. Looks nicely made stuff! 0dBm is usually a 1kH tone at 775mV across 600 ohms if I remember correctly.
13:55 regarding the modem card, you can use those to make a "digital fax", up to Windows 7 has still build-in fax software (don't know if newer Windows versions still has) for sending and receiving faxes. i have use those in the past when i had a phone landline, and you could simple send a fax like you send a mail. Was very handy and didn't take extra space in your office like a fax machine does.
Hi Rich, I did a similiar thing, I am a complete novice, I was trying to fix a dehumidifier power supply, it had some blown components which I changed, I powered the circuit board up through my current limiter but the bulb glowed brightly, I spent days looking for a short, I found the short went away when the compressor was unplugged, the compressor wasnt short, so I powered the unit up straight from the mains, and it worked fine, I assume the current limiter wasn't giving enough power to start the compressor
Entertaining and educational, as always. Of course, an Ikea battery is supplied flat, ho, ho. You must be accumulating a ton of plastic and metal which I assume goes for recycling or do we have to send the boys (and girls) round to throw baked-beans at you.
Please make more videos on pcb tracing and reverse engineering with multimeter continuity mode... this time please choose multi layer pcb to trace & reverse engineering on it. Please humble request to you Richard make more videos for tracing ❤
Yeah you can ask whatever you want - but I use the sold listings. This is what people have bought and what they paid. Can we agree that is a good indication of price? If none have sold in the last few months I class the item as worth nothing.
@Mr Guru Of course. The reason I tend to not include items that have not sold (though some are listed) in the last three months is to give a more realistic projected profit. No way is perfect (well maybe a time machine, but if I had one of those i wouldn't need to look for retro hardware at a flea market 😁) but in response to various comments, and some criticism, on previous flea market videos I'm trying to this better. I'm just in the process of setting up a website for listing and selling retro hardware I find at the flea market, with a link to the video that item was featured, so then hopefully it will be even more realistic. It's not my top priority to get the website up and running so it may take me a month or three. Interestingly though, a couple days ago I had an unsolicited offer of $150 USD for one of the rare items I found and featured on a video recently (plus postage) which I accepted, so that is very encouraging.
@@LearnElectronicsRepair You're going to make me ruin a bad joke even more now... 1.21GW enables timetravel, so 1.21GHz should enable sending radiowaves across time... Which would be worth a tad more than just sending stuff in our time...
Mate it’s so good you show mistakes and show the human side. Your channel will be big I reckon!!
From learning to repair Electronics I like u most! U explain it the best Way for me. Thank you for that so much my Best!
That unmarked board is a DFI AD77. It says AD77 on the parallel port.
I got triggered by the VT8235, which means that it is a kt400 chipset or later (i have a bunch of km400 and later hw with that southbridge -- that's the kt400 but with integrated graphics). Some googling for images then quickly got me to the same orientation of the ATX connector and the two ide connectors, and then i read "DFI AD77" and actually said "of course" out loud, as i had noted the marking on one of the connectors.
Part of the fun of your videos, for me, is this exact guessing game :)
I definitely would love to see this one diagnosed. KM400 is the first unichrome on a chipset for amd, i still have my km400 machine sitting under my desk, even though i haven't tried to boot it in a decade. I also plucked a lot of bios write enables for a variety of VT8235 from bios images to add them to flashrom, so this one ticks two boxes with me.
It's great to see I get viewers playing the game 🙂 Any idea where I can find a BIOS file for it?
Well done, you got further than me. I was going to suggest removing the northbridge heatsink, I was lead to believe the 8235 matched the kt333 or kt400 northbridge and this would have revealed which.
This is an audio device with 2 beautiful PPM meters for setting and watching the audio output levels. Number 4 is for 0dBm sound level and number 6 is for max audio level for going to a transmitter. Each division is 4dBm level change. Above 6 will cause distortion due to overmodulation. The cards on the back of the meters will be the amps for driving the law for the meters as well as perhaps built in limiters., to avoid over modulating the transmitter. Now I see the transmitter to go with it. Could be a link transmitter for looping into a studio feed for external broadcasts. Looks nicely made stuff! 0dBm is usually a 1kH tone at 775mV across 600 ohms if I remember correctly.
13:55 regarding the modem card, you can use those to make a "digital fax", up to Windows 7 has still build-in fax software (don't know if newer Windows versions still has) for sending and receiving faxes.
i have use those in the past when i had a phone landline, and you could simple send a fax like you send a mail. Was very handy and didn't take extra space in your office like a fax machine does.
Look at the meters and boards they are bbc type peak program type each worth a lot more that you paid for the lot!
Well caught 👍. ... maybe the protection box could have a little audio to go with the light?
Keep up the great work 😀👍
Happens to the best of us !....cheers.
Hi Rich, I did a similiar thing, I am a complete novice, I was trying to fix a dehumidifier power supply, it had some blown components which I changed, I powered the circuit board up through my current limiter but the bulb glowed brightly, I spent days looking for a short, I found the short went away when the compressor was unplugged, the compressor wasnt short, so I powered the unit up straight from the mains, and it worked fine, I assume the current limiter wasn't giving enough power to start the compressor
Entertaining and educational, as always. Of course, an Ikea battery is supplied flat, ho, ho. You must be accumulating a ton of plastic and metal which I assume goes for recycling or do we have to send the boys (and girls) round to throw baked-beans at you.
Please make more videos on pcb tracing and reverse engineering with multimeter continuity mode... this time please choose multi layer pcb to trace & reverse engineering on it. Please humble request to you Richard make more videos for tracing ❤
When i have those sort of boards to repair I always make the reverse engineering videos. It all depends on what I have to work on.
Richard the AMD board is an DFI AD77 Infinity KT400
Just what I needed.
you can ask the prices you ask for them doesn't mean they'll sell though
Yeah you can ask whatever you want - but I use the sold listings. This is what people have bought and what they paid. Can we agree that is a good indication of price? If none have sold in the last few months I class the item as worth nothing.
@Mr Guru Of course. The reason I tend to not include items that have not sold (though some are listed) in the last three months is to give a more realistic projected profit. No way is perfect (well maybe a time machine, but if I had one of those i wouldn't need to look for retro hardware at a flea market 😁) but in response to various comments, and some criticism, on previous flea market videos I'm trying to this better. I'm just in the process of setting up a website for listing and selling retro hardware I find at the flea market, with a link to the video that item was featured, so then hopefully it will be even more realistic. It's not my top priority to get the website up and running so it may take me a month or three. Interestingly though, a couple days ago I had an unsolicited offer of $150 USD for one of the rare items I found and featured on a video recently (plus postage) which I accepted, so that is very encouraging.
defintely not just you with the what are often called 'brain farts' :)
On the last board is the bios chip in the top right under the white sticker? if so is that in a socket, if not how do you remove it? Thanks
Hello Richard , d'ont worry you will find more in that Mercado das pulgas ;=) . Cheers
Did you put in the caps backwards?
I hope not! But I was having a bad time at the office so who knows?
You should put CDs first inside and then with the button you will be able to eject them :)
Hi Richard, do you have an ebay store or something where we can buy any of your finds online? Thanks for your knowledge and videos!
Heya 1 more very nice repair vlog
Eprom file= 42 😆😂
Sadly that rf amplifier is only 1.1 GHz and not 1.21GHz :(
Haha, good old 1.21gw, zero flux given 😁
@@Mark_C1 Well it's not worth much if it can only send/receive RF in this time...
Go on, tell me why 1.21GHz is better, I guess it's a radio ham thing?
@@LearnElectronicsRepair You're going to make me ruin a bad joke even more now...
1.21GW enables timetravel, so 1.21GHz should enable sending radiowaves across time... Which would be worth a tad more than just sending stuff in our time...
@@luc_libv_verhaegen Ahhh not 1.21 Jiggawatts? Stupid me LOL 🤐