CRT service - advices - for dummies

Posted on 2023-08-25, 23:06

by

by Martin85

in Marvin \ Video

in Marvin \ Video

Hey there, I got 6 sony bvm crt's that are in nurgent need for service, some have crooked geometry, others colors,... Reading and watching videos got me really scared of the high voltages in those appliances. I am a repairman at heart, but 15 0r 20KV are really out of my league. I got some sony 14m4 …

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Re: No post, boot Amptron PM-8600 - Socket 7

Posted on 2023-08-23, 16:42

by

by Martin85

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hey, after a long time, could you take a close photo of the CACHE chips? Considering changing them, but I see from your photos that you have different chips... Hopefully I can find some of those chips somewhere.

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Re: A box full of old video cards... are they worth saving?

Posted on 2023-08-23, 16:29

by

by Martin85

in Marvin \ Video

in Marvin \ Video

Hey, after reading your answers, well I decided to keep them. Maybe they will come handy sooner or later. They don't take that much space anyway. The one I listet above are only AGP cards, the PCI and ISA are much less in number and are mostly in use in old systems I have. Got to make some space, …

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A box full of old video cards... are they worth saving?

Posted on 2023-08-22, 14:18

by

by Martin85

in Marvin \ Video

in Marvin \ Video

So last week I was going through the box of video cards I am not using and was kind of sorting them by connector/standard... ISA, PCI, AGP, even some PCIex (not interested in those anyway),... Are those even worth anything? I know some are sought after, but I don't think I have the best versions, …

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Re: SB16 CT2290 distorted sound

Posted on 2023-04-13, 15:39

by

by Martin85

in Marvin \ Sound

in Marvin \ Sound

Hey, just did a total recap on this 2290. Now I have an actual dual slot sb16 :D Couldn't get my hands on small 470uF 16V caps, so I used 470V 25V and are quite big, so I should take care when installing the card in the computer. Anyhow, I have another problem right now. In the meantime, while this …

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SB16 CT2290 distorted sound

Posted on 2023-02-02, 19:39

by

by Martin85

in Marvin \ Sound

in Marvin \ Sound

I was using my old 386 for some relaxing gaming on the monkey island and I heard some weird clipping/distortion out of the headphones... Connected some speakers... the same! Then I went directly into the sound card of my main modern computer to record it and here you go... I guess it is some bad …

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Re: Bought these (retro) hardware today

Posted on 2023-01-12, 18:19

by

by Martin85

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Just got two of these plus one apple mouse which I still have to clean a little bit. As far as I got, these should be amstrad mices? Am I right? Guess also not compatible with x86 machines since the connector is male, for a normal pc should be female and guessing pinout and probably voltages are …

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Re: Serial mouse problems with 486! Please help!

Posted on 2022-12-14, 19:06

by

by Martin85

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes it is the same under win3.1x.

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Re: Serial mouse problems with 486! Please help!

Posted on 2022-12-14, 17:38

by

by Martin85

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

There is the genius easymouse pcb.

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Re: Serial mouse problems with 486! Please help!

Posted on 2022-12-14, 17:35

by

by Martin85

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I used CTmouse under DOS 6.22 Using it in 2 button mode.

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Re: Serial mouse problems with 486! Please help!

Posted on 2022-12-14, 14:47

by

by Martin85

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hope I can use this thread instead of opening a new one. Having some issues with a Genius easymouse on a 386. When the driver is loaded, the mouse can only go left to right and as far as I know the left button works. What could be the problem? On the pcb of the mouse there is nothing that could …

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Re: Finally a nVidia 6800 NV41 work around so Windows 98 shuts down and system turns off with no weird patch file. For 1

Posted on 2022-12-03, 06:09

by

by Martin85

in Marvin \ Video

in Marvin \ Video

Huh funny thread! Back in the days I used this tricks, but in the opposite way. Was a student with not that much money to spend and wanted a quadro for 3d modelling. So I was searching for a pciex geforce 6800GT revision A1, which I then modded into a fully working quadro by changing the bios on the …

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Re: Philips Brilliance 15a - model 15a12ta

Posted on 2022-11-28, 20:38

by

by Martin85

in Marvin \ Video

in Marvin \ Video

So if I understand correctly... TTL shoudld be used always, with monochrome or color source? I had some weird stuff going on while testing the system yesterday. But have to check first on other monitors (lcd and crt) before I jump to conclusions.

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Philips Brilliance 15a - model 15a12ta

Posted on 2022-11-27, 16:10

by

by Martin85

in Marvin \ Video

in Marvin \ Video

Does anybody have a manual for this monitor? It has a switch on the back labeled as S.O.G. and TTL what is it for? Googling around give nothing really... 🤔 As far as I tested the monitor it works ok.

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Re: 2.5" IDE SSD surprise found in old "for parts" laptop

Posted on 2022-11-25, 21:01

by

by Martin85

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Really nice find! Thumb up!

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Re: My 286 motherboard collection

Posted on 2022-11-24, 09:48

by

by Martin85

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Good info! I ordered some time ago sime double 2032 holders... I modded one for the 386 with two diodes and a resistor to bring down the voltage closer to 4-5volts... Do you think I could go without this? Maybe only a diode to stop current going into the cells?

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Re: My 286 motherboard collection

Posted on 2022-11-24, 08:14

by

by Martin85

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

nice big collection, it looks like some1 butchered the socket on the non working last board at the bottom, im curious most of the boards have batteries removed except like 3 that have the green barrel still attached Yup, fresh batteries I soldered in place of the old, desoldered ones. I simply used …

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Re: No post, boot Amptron PM-8600 - Socket 7

Posted on 2022-11-23, 13:57

by

by Martin85

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes, I have the same problems with SDRAM... everytime it gives a random number 😁 This board is plagued... Do you have L2 cache enabled? Lucky you, mine stopped working...

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Re: Compact Flash as HD problem

Posted on 2022-11-22, 20:41

by

by Martin85

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

May it be, because DOS sees it as a 2GB HDD, while BIOS is looking for a 8GB? I think you should set it manually in bios as a 2GB drive. Or am I wrong? Feel free to correct me. It happened to me once on a 386, where there is no autodetect function in bios and I had to manually set the value of Cyl, …

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Re: MAT286 problems / won't start / Gate A20 error - please help with diagnosis

Posted on 2022-11-22, 20:17

by

by Martin85

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Checked... but cannot figure where does pin 22 of the KBC go... The pin of the socket on the back side of the board is a dead end... that means it should be on the top of the board, but also cannot see it go anywhere... Now... or is the path hidden under the socket, or is the PCB a multilayer board, …

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