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| LeCroy WaveSurfer 24MXs-B Motherboard |
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| tppc:
Hi there, I just collected a non working LeCroy WaveSurfer 24MXs-B. When turned on, the front panel buttons light up for 1 sec, fans do spin and that's all. No beep, no boot, nothing except the fans and LCD backlight. I connected an external VGA monitor, but no signal. I read that the PSU on these WaveSurfer series was often an issue. Not this time. Mine is OK, I tested all voltages (+3.3V, -3.3V, 5V, +12V, -12V, -6V) all measured OK. I also tried powering the motherboard with an external ATX PSU and a VGA monitor. It does not boot, and still no VGA signal. BIOS 3V battery is OK. Conclusion, the motherboard is Kaputt! I also read that this mobo is unobtainium. Does anyone have a suggestion for a replacement solution? The board is the first series with PS/2 port and PC104 slot. Regards, tppc |
| Martin72:
Hi, --- Quote ---No beep --- End quote --- Got an onboard beeper ? Possibilities to check CPU and RAM externally ? Can you upload a pic from the motherboard ? Martin |
| tppc:
hi, thanks for the reply. no beeper on the mobo, the beeper is on the PC104 extension board. I tried with and without the RAM, no difference. I have no way to test CPU/RAM externally. Here is a picture of the back of the board (I had it on my smartphone) Will not be able to take a picture of the other side (for the moment) since I put it back in the scope |
| nctnico:
I'd try reseating all jumpers (if any) + changing the processor and memory first. But before putting a new processor in, check the processor's supply voltage & jumpers. I also spot some fuses on the back of the board; are these OK? |
| Martin72:
--- Quote from: tppc on May 08, 2022, 08:19:44 pm ---I tried with and without the RAM, no difference. --- End quote --- Well, that´s not a direct indicator except the RAM got an short circuit. --- Quote ---Here is a picture of the back of the board (I had it on my smartphone) --- End quote --- Seems to be a µATX board with 20-pin ATX supply connector, would check the fuses too like nctnico suggest. --- Quote ---Will not be able to take a picture of the other side (for the moment) since I put it back in the scope --- End quote --- A pic from the top-side of the board would be very helpful - For you, in the end.. ;) (Because chances are high to identify it) |
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