So I inherited this old compaq 433 from my father.(he was a computer guy, I'm a noob) It's running win95, it came with an intel i486 33mhz CPU with 4mb of RAM and 4mb of built in ram on the board. It has a floppy drive and one IdE connection attached to a 256mb hdd. It also has a 56k modem and a null modem port. I forgot what it's called lol. Ok so I decided that I wanted to learn computers for whatever reason it doesn't matter. So I started tinkering with his old computers, taking apart a few and making a Frankenstein pc, and now I'm starting a ryzen build. So whatever I found this compaq 433 in the basement and I thought it was cool so I decided to upgrade it (LMAO) to a whopping amd 5x86 133mhz CPU, I added 16mb of RAM (20 total) and I set all the jumpers to the correct places. I used the same exact power supply I always use with it. So the problem with this computer is that when I turn it on, it goes straight to a white screen. It doesn't perform any boot sequence or memory check or drive search or anything. Just blank white screen as soon as I press the power button. I'm editing to add that this is a one piece computer. It does not have a tower. The motherboard is inside of a drawer under the screen. Like I said, I'm a noob, I'm still learning (the hard way (it's fun)) so I may have missed something very simple that I just didn't know about because i have a lack of experience.
Help with older computer
- Thread starter Tidusx
- Start date
Solution
Good luck. They are quite nice while working 
Nigel
Nigel
Nigel Spike
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I had one of those until last summer, when the HDD died. Mine was a 486DX @66MHz.
I think your problem is that the 486 33MHz uses 5V, while the 5x86 133 MHz wants 3,3V. However check this out http://eintr.net/systems/compaq/presario433/index.html
Nigel
I think your problem is that the 486 33MHz uses 5V, while the 5x86 133 MHz wants 3,3V. However check this out http://eintr.net/systems/compaq/presario433/index.html
Nigel
You're correct! I need a voltage friggen converter lmfao! I stuck my 66mhz chip in, I think the RAM I bought is shot, it starts reading the RAM and then it flashes a white screen and resets and does it over and over again until I put in the original 4mb I had. So now my new problem is the ram. The guy I got the RAM from swears he tested it and it worked. I'm just learning as I go along here lol.
Nigel Spike
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Nigel Spike
Distinguished
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Nigel Spike
Distinguished
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My kids grew up with it. I kept it mainly to keep up the DOS knowledge, and for nostalgia [sigh].
Nigel
Nigel
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