Creative Sound Blaster 32 PnP CT3620 – Not detected, looking for help!

Hi everyone!

I recently recovered this Creative Sound Blaster 32 PnP CT3620 from an old Pentium 166 PC. I'd really like to bring this card back to life, but unfortunately I'm having trouble getting it detected.

I'm using a SOYO 5EAS5 motherboard with an AMD K5 PR100 as my test platform, running Windows 98 SE.

Here's what I've tried so far:

- Cleaned the ISA connector contacts with isopropyl alcohol.
- Removed both SIMMs from the sound card and tested it again. No change.
- Checked jumper JP3 (WF_BEN). It was originally open, so I tried setting it to match the configuration shown in the CT3620 reference on The Retro Web. No improvement.
- Checked the BIOS Plug & Play settings. Resources Controlled By is set to Auto, and Reset Data Configuration Data is currently Disabled.
- Ran Creative's CTCM utility, but it reports: "Please run Win 95 to initialize your system configuration". I also get this message when running it from Windows 98 SE's DOS mode.
- Checked two ISA slots using a Tseng Labs ET4000AX graphics card. The graphics card works in both slots.
- Tried the CT3620 in both of those same slots, but it still isn't detected.

Windows 98 SE doesn't show the card in Device Manager, not even as an unknown device.

I've also started inspecting the card physically. So far, I've only examined the component side. I haven't identified any obviously missing components, but there's something around capacitor C20 that looks a little suspicious. It appears darker than the surrounding PCB, although I don't know whether this is just residue or something more serious.

My next step is to inspect the back of the PCB, check the component leads and solder joints, and look for damaged traces or vias.

This is where I could really use some advice!

I'm not particularly experienced with electronics troubleshooting, so I'm not sure how far I should go or what to check next.

What would you recommend?

- Should I start by checking continuity around C20 and the surrounding traces?
- Could C20 itself be faulty and need replacing?
- If I find a broken PCB trace, would bridging it with a small jumper wire be a reasonable repair?
- Are there any specific voltages or components I should check first?

I'd rather not start replacing components or attempting repairs without understanding what I'm dealing with.

Any suggestions, troubleshooting tips or advice would be greatly appreciated. I'd really like to get this old card working again! 🙂

Thanks!