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Re: Did PC-Chips ever release a high quality motherboard?

Posted on 2020-09-02, 03:10

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

My PC Chips M550 worked flawlessly for years with 64MB of RAM and a Pentium 166 MMX . Before that, I ran a Pentium 150 at 187MHz in it with zero issues for at least a year before upgrading (sidegrading) to the 166 MMX . Just got one of those M550 motherboards and i can't seem to connect anything to …

Re: Help fixing my Aptiva's pc speaker

Posted on 2020-08-24, 13:43

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

mb3.jpg For your close up photo it is now quite clear that the 4 pins header is indeed for connecting external speaker. The BC55 is an NPN transistor, and the circuit is a typical common emitter switch, which sinks current to ground when it's turned on, like this: SC0001_img0001.gif The 2 "680" (68 …

Re: Help fixing my Aptiva's pc speaker

Posted on 2020-08-23, 23:10

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ok so the left on-board speaker solder pad (in your new picture) goes somewhere, can you use a DVM and check the ohms from it to both the +5 Red and Ground Black at the PSU connector (with power off of course ;p) ? Then do same from Pin 4 on J27. That way we might be able to figure out a bit more …

Re: Help fixing my Aptiva's pc speaker

Posted on 2020-08-23, 22:54

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Did you put the jumper back on J27 pin 1-2 ? From your picture I drew the on board signal lines, yellow and black. Yellow for SP and the black for Gnd or +5 (not sure which, but assume it is +5). You should be able to hook the original piezo to 1 and 4 of J27. Did you get a picture of that area …

Re: Help fixing my Aptiva's pc speaker

Posted on 2020-08-23, 21:18

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you so much for replying! I noticed the speaker was magnetic right before it fell off the motherboard... Now it doesn't seem to attach itself to metal, so i'm not 100% sure... Is it a piezo or a coil+magnet one? At this site, the guy reviewing an IBM Aptiva (almost same model as mine), says …

Re: Help fixing my Aptiva's pc speaker

Posted on 2020-08-22, 13:30

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So, maybe i should try connecting the red wire to pin 1 and the black wire to pin 4? If it doesn't work, try the red wire on pin 2 and the black one on pin 4? Maybe i'm confusing the wire colours? Thanks again for all the help! Yup try this. The color doesn't matter, if the polarity is reversed the …

Re: Help fixing my Aptiva's pc speaker

Posted on 2020-08-21, 17:04

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hmm maybe It is pin 2 that is the signal pin. If you have a multimeter you could check to see which pin connects to the broken pin of the original speaker. Alternatively, you could take the receptacles out from the 4 holes plastic shell, and connect them to the header naked. Try pin 1 and pin 4 of …

Re: Help fixing my Aptiva's pc speaker

Posted on 2020-08-21, 13:01

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Jumper J27 does look like a 4 pin speaker header. Usually it has only 2 pins at the side with the center 2 pins removed. For you case, if like what you said the jumper is for enabling/disabling the on board speaker, then yes it is safe to just remove the jumper and plug in the 2 wires speaker you …

Re: Help fixing my Aptiva's pc speaker

Posted on 2020-08-21, 11:29

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It's quite easy to identify piezo buzzer vs magnetic speaker. The buzzer has a plastic sealed bottom while the speaker doesn't. Piezo buzzer: Piezo.png Speaker: speaker.jpg Usually those that are soldered onto the motherboard are with 2 legs (like the one above), while those with wires have 2 …

Re: Help fixing my Aptiva's pc speaker

Posted on 2020-08-21, 10:01

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'd just solder two wires to the speaker and connect them to the motherboard. It won't sit flush like that but you're less likely to knock it off again that way. 😉 Thanks. But where should i put the speaker then? Sitting on the motherboard somewhere or inside the case somewhere? If it's indeed …

Re: Help fixing my Aptiva's pc speaker

Posted on 2020-08-21, 08:43

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Most of those onboard PC speakers are Coil+Magnet but a rare few are PIZO speakers. If the original is a Coil+Magnet then yes you could solder the one you have onto the board using short solid core wire which does not bend as easily. You may have to remove the board from the case to do it properly …

Help fixing my Aptiva's pc speaker

Posted on 2020-08-20, 23:51

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So, while installing new RAM on my IBM Aptiva, I accidentally pushed the pc speaker on the side of the motherboard and it fell out of place... I tried to move it back in place but it was soldered to the motherboard and it completely came out... Was thinking of getting another one but my motherboard …

Re: Help with flashing a S3 Virge GX PCI card BIOS

Posted on 2020-07-15, 20:40

in Marvin \ Video

in Marvin \ Video

I'm afraid that this card isn't prepared to flash its bios on board :( None of the Virge cards I have seen were. Fortunately chip itself could be re-programmed. You have to remove EEPROM chip from card and program it in external programmer. By the way - BIOS version 2.01.07 may be better choice …

Help with flashing a S3 Virge GX PCI card BIOS

Posted on 2020-07-15, 19:50

in Marvin \ Video

in Marvin \ Video

So, I got a Venus DGX4 REV 2.0 S3 ViRGE GX On Board (86c385) PCI 4MB card for one of my old machines and I'm thinking about flashing its BIOS with a file i found online but I'm not sure about how to do it. My cards bios says "S3 VIRGE 375/385 vedio BIOS. Version 2.01.13D" and the one I found says " …

Re: How about a MR-BIOS ROM file repository?

Posted on 2020-07-01, 12:10

in Marvin \ Software

in Marvin \ Software

OK, guys, I am super excited to share this link with you.. Because I have either hit the MR BIOS Rom motherload.. Or I just found out something you all already knew and I'm getting all excited about nothing, but: http://www.elhvb.com/mobokive/archive/power_utils/cdroms.txt And the CD contents are …

Re: Creative 3D Banshee - Anyone have original install disks?

Posted on 2020-06-25, 11:26

in Marvin \ Video

in Marvin \ Video

Well, I figured there would be some promo stuff on there, like how the MPEG decoder cards came with the short movie with the guy watching a DVD on his computer, then getting sucked in to an Indiana Jones scene. Or like the audio card discs are stuffed full of things... SoundFonts, MIDI files, apps, …

Re: I recently bought an IBM APTIVA, and i need some tips...

Posted on 2020-06-24, 01:11

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you so much for the info! Just bought a L2 module on ebay. Now i'm thinking of buying a new pentium 200mhz processor too, and upgrade my 133... My problem is: will my heatsink work with a 200mhz? It doesn't have a fan... does the 200mhz need a specific heatsink with a fan? If it does, i'm not …

Re: I recently bought an IBM APTIVA, and i need some tips...

Posted on 2020-06-22, 18:24

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes, originally they did not come with a fan. My IBM Active 200mmx does not have a fan either. I don't know what the performance difference will be between 133 to 200 but I don't think it will be much. See if there is a fan connector ( header ) on your motherboard otherwise you will have to use a …

Re: I recently bought an IBM APTIVA, and i need some tips...

Posted on 2020-06-22, 17:32

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Try searching the internet or eBay on that IBM part number. Thank you so much for the info! Just bought a L2 module on ebay. Now i'm thinking of buying a new pentium 200mhz processor too, and upgrade my 133... My problem is: will my heatsink work with a 200mhz? It doesn't have a fan... does the …

Re: I recently bought an IBM APTIVA, and i need some tips...

Posted on 2020-06-22, 15:54

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

As long as you have 256kb or more you should be okay. Most high end Super Socket 7 motherboards came with 512b of motherboard cache. Thanks again for all that useful info! The first user posted this about the L2 cache module: "(the manual says that it must have 160 connectors, 64 bits, and 15ns)" I …

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