When you pressed on the GPU/CPU, you shorted something and blew a fuse. Best to replace the motor controller since those things are known to blow (usually from disc swapping since it pulls excessive current when the spindle motor has stalled). Most likely yes, something blew. I see from your other ...

Cancel this. I fluxed/reflowed the GPU/CPU. Turned on with the same issue but I pressed down on the CPU/GPU and the screen went black. Haven't been able to get it back since. I'm packaging up and the SCPH-1000 is simply a conversation piece now. I love the PSX, may buy a new model but I am abandonin...

I'm back, here is another SCPH-1000 (PU-7) that I purchased as a for parts which simply seemed like it had a bad laser. Nope, it has some major issue. Turns out that while it does spin the disk, other than the laser going up and down it does not even really try to read the disc. It varies in how lon...

Sure I just might do that. I just recieved my second SCPH-1000 today that has a "bad laser" but good sound. It had rusty finger prints on the inside. Same problem as my other SCPH-1000. Turns on but all inputs freeze at the memory card / CD Player selection screen It doesn't even seem like...

I appreciate the feedback. I have abandoned trying to fix this particular board. I attempted to bypass the SPU and have it just be a CD player but I realized that although it was booting past the white Sony boot screen into the main menu, it actually was freezing as soon as it got into the menu. I h...

Shadow wrote: ↑January 29th, 2021, 11:23 pm Ah, I just watched your video. Check the four DRAM chips

Funny you say that, I never did much with those four chips. Not even a simple reflow. I just nailed them now with a reflow and nothing :/

What made you suspect them?

What kind of damaged? Oxidized? Probe a working unit and measure its resistance. Measure its resistance at factory spec, followed by fully closed. Worst case swap the trim pot from a working unit temporarily, make your adjustment and measure its resistance. Recreate that using some resistors, I'm as...

Made a last video of the issue. Pretty much more of the same, taking any ideas. I'm putting way too much time into this but I don't like to give up without a fight. I found a seller that has a for parts SCPH-1000 that just has a mildy poor case as well as a bad laser. This SCPH-1000 model seems to c...

I have reflowed it many times, I have viewed it many times from my camera phone to make sure pins were OK.

I put in a diffrent model SPU Ram, same issue. I put in diffrent model SPU just now and now there is no video. Will pinout later but I am guessing it doesnt like this replacement SPU.

Check if the PS plays the CD audio correctly (on cd player menu)... and if so, the problem should be the SPU. Maybe you replace the CXD2922Q with a broken one. Yes, CD Audio works perfectly. I can tell in a game if it is playing a .wav audio or if it is generated by the chip on board. I do not thin...

I ran around and replaced a few 10uf caps, no difference. I do have a collection of new non SMD type caps for this. I suppose I could just do a full recap... Any suggestions on where to look? I'm wondering if the 5501 SPU chip would have worked and I just did not seat it properly... There was just n...

You are right, but the serial is on the top metal cover. It does not match, although close.

I'm throwing in the towel. I replaced the SPU IC with one from a 5501 along with the RAM. Didn't solve the issue (new chip did not work). Old ICs back in, problem remains.

Anyone have a PU-7 for sale?

Hi Shadow, Thanks for the suggestion. I have the unit disassembled now. It is 10/10 mint on the inside. Not a fingerprint - looks I'm the first in there since new. So far flexing the board or putting pressure on chips has not fixed the issue just yet. I am wondering if this unit never worked right a...

Hi everyone, I'm a long time PS1 enthusiast. Used to be on an old message forums way back in the day uploading ISOs to public FTPs. I believe the message forum was PSX-ISO. Maybe someone remembers this web forum? I am in need of suggestions for solving an issue with a PU-7 SCPH-1000 I recently acqui...