Can you upload a picture from the whole board?
Interesting… I’ve seen quite a bit, but not that. Kinda like it got way to hot, due to lack of airflow.
CapLeaker
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Last Activity: Today, 03:30 AM
Joined: 12-04-2014
Location: Atlantic Canada
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I guess they use the DSP board for the delay, reverb etc. If the reverb isn’t working the DSP is dead. Verify if it is getting any power.
These kind of speakers have a hard life. Being tossed and kicked around, stored in a wet basement, spillage, etc… perfect recipe for cracked solders and other damages.Leave a comment:
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I think
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That’s what I was thinking on doing. However I don’t have a different 2000 series Ryzen and have to buy one. That’s why I ask if someone has that combo and is running a full win11 version on it as a proof of concept. Because officially Lenovo sez “No”....Leave a comment:
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That would be my preferred “go to” fix… unfortunately that Linux off ramp is not an option here, otherwise this thread wouldn’t exist....Leave a comment:
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Then take the next voltage and or capacitance range up. There is a 10% rating on caps anyway.
Example: If you replace a 10V 680uF with a 16V 680uF or a 16v 1000uf that should work fine as kind. I don’t have every voltage range capacitor either.in stock.Leave a comment:
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To really test a high voltage capacitor you need something else than an ESR meter. On these you actually need to do a leakage test to be sure.
I’ e run into this before. Some high voltage caps show good one of the most expensive Fluke meter and a ESR component tester. But somehow there is still a problem. So I did take them out for a leakage test and then they all had failed....Leave a comment:
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I don’t want to do the TPM bypass in this case, just wanna have that thing running as it supposed to be. I just don’t have any extra time to babysit another machine if something doesn’t go just right. Low profile cards the least of my worries, I got a few of these.
I had in mind more or less upgrading the CPU to whatever win 11 supports, throw another stick of RAM into it, upgrade the HDD to a SSD (because I have one) copy the Win 10 pro HDD content to the SSD, then upgrade to Win 11 pro.
Hand the damn thing over and Hope I don’t get it back to fix something on it....Leave a comment:
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… forgot to mention: never test a hot capacitor. The ESR and capacitance reading will be off. That’s why the blow hot air on bad caps trick works to start a PSU for example,Leave a comment:
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Drain and source of the mosfet short could be because you turned the gate on. Do a proper test of the mosfet with your DMM in diode mode and try turning the gate off an on. There are you tube vids on how to do that,Leave a comment:
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I guess you have to fix the shorted out components in this PSU now. What you should have done first place was checking the state of the supervisor IC in the secondary of the PSU when connected to a motherboard and didn’t work, vs not connected and forced on.Leave a comment:
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No surprise there. Small caps next to a heat sink are always trouble. One of my first things I look for. Unless the other once circled in blue are 40 years old, they are still going to be within tolerance. Take em out and check....Last edited by CapLeaker; 07-20-2025, 03:24 PM.Leave a comment:
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Didn’t have any time to look at it further. Not sure if I can see any branding because it is a SFF and unless I disassemble most of the case, I can’t get the main board out. Even if I have to get a different cpu, I’d like to get this thing going for my kid instead of turfing it. Even if I have to flash the bios with my programmer in order for it to accept a supported CPU....Leave a comment:
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Bypassing protection is only something for the more advanced folks here. Other than that I don’t recommend it at all. I do bypass protection circuits all the time too. BUT: One has to know what they are doing too.
As far as Samsung vs Sony, I have both and work awesome! My Sony made once a physical buzzing and zapping noise from inside the TV during a heavy thunderstorm, then it shut off. I turned it back on afterwards and did a black screen. Unplugged it, wait for 10 mins, plug it back in and it is still going like a champ as nothing had happened. I was close to opening the TV...Leave a comment:
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Check with the oscilloscope what goes into the PA. Would be my first step.Leave a comment:
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Probably the NPN is used as a switch. So you got power there ready to go, but there is nothing on the base of the NPN, so it sits there not getting turned on. There is probably nothing wrong with the board itself. I’d go for the print head, take it fully apart and clean it. That seems to help 50% of the time. There are some models that once you hit 25000 pages the print head seems like just to die or something. Why I don’t know. I just end up replacing the whole printer if cleaning the print head doesn’t help, since replacing the print head is about the same price than a new whole printer....Leave a comment:
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Usually I don’t mess with Win 11, but in the business world I have to.
Well this is the thing: The computer is a Lenovo and the motherboard is a Lenovo, so is the bios. While the B450 boards are upgradable, by other manufacturers like ASUS, MSI, Asrock whatever… Lenovo did not supply a bios update to support anything past the Ryzen 2000 series CPU’s. Official Lenovo sez the M725s isn’t supported by Win 11. But I am not that sure if there was a M725s with a Ryzen 2600 or 2700 available, those should be able to run Winn 11, unless the bios doesn’t support TPM 2.0 and I haven’t...Leave a comment:
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Lenovo M725s AMD 2400G upgradable to run Windows 11?
I’ve got this Lenovo M725s with an AMD Ryzen 2400G here on the bench. Supposedly it’s only good for win 10. Win 11 doesn’t support the Ryzen 2400G. However Win 11 does support the Ryzen 2600?
there are a lot of CPUs that fit the AM4 socket, but this mother board based on a 450 series does not support the Ryzen 3000series or up. I think due to bios limitations from Lenovo.
Now here things get vague: In one way Lenovo sez the M725s’s are not upgradable to run win 11. Other hand Win 11 supports the AMD 2600 and the 2700.
Anyone got an M725s with a Ryzen 2600... -
What model number? Got a schematic to boot with it?Leave a comment:
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Interesting… hoping for more nice pics!Leave a comment:
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