PS2 (pstwo slim), power on but no green light. Help!

[nektheheck]

Hello everyone,

I bought a brand new Pstwo (slim one) model 75004 and installed a crystal chip v1.1 on it with no success (no power on). I then decided to remove the chip completely and check for broken fuses and such.

After I was finished un-soldering I noticed that I had accidentaly broken off the connection bracket for the reset/on button's ribbon cable (which might have been the problem in the first place, *do'h!). Since I had no replacement ribbon cable I proceeded to carefully disconnect the bracket on the mobo and connect the button with regular wires (same I used for mod-chip). Now I get a red light on the console indicating power, but the console will still not power-up.

I googled around and read a lot of forums. I checked all of the fuses I could identify as such but all except for PS1 were fine. I replaced PS1 with a new fuse but still no luck. I have checked and rechecked everything and I am totally out of ideas.

I read of two or three people having the same problem (broken reset button and then no power-on) but no-one answered them. I hope some of you experts can help me out. Any suggestions would be greatly appreciated.

Thank you!!

//edit
A few silly questions:
- Is it possible to turn the console on without the laser unit and battery connected? It would be great to able to check the unit without having to connect everything every time.

- The cables going from the mobo to the reset/on button board are about 5 inches long. Could this have any influence on the funcionality?


- is it possible to check the onboard chips with a multimeter?

//edit off

[HypERSoniC]

silly answers -
a) the ps2 *should* boot without the lazer unit + battery (someone correct me if im wrong)
b) No, this shouldnt have any effect
c) Dont know, probably not.

And to answer your overall question, id say there is a problem with your ribon cable or your soldiered connections.

could you describe the exact funtionality of the ps2? do you get a standby and just cannot turn it on to full power mode?

also check your ps1 fuse again.

as a side note, if you have any spare ps1 fuses, could you give me a pm? id be happy to buy them from you.

[nektheheck]

Hi HypERSoniC!

Thanks for the response. I just checked my wiring (I also rewired it extremely carefuly yesterday) and everything seems to be connected right. I measured resistance between the wires (between eachother) and they all read infinite except for one pair that read 200 Ohms, which I guess is ok.

Functionality:
When I plug the ps2 the red led lights but the unit does not turn to full power mode when I press the button. There is no video signal to be seen (not even a shor flicker). The fan does not spin either.

I checked the 3,3v connections point against ground and it reads ~40 Ohms. I read in this forum that a reading of under 80Ohms means there is a short somewhere. Could someone please confirm this?
//EDIT: confirmed: the reading of 40 Ohms is normal!

Does anybody know how to "switch" the pstwo on without the button? (I mean from the mobo directly).

The PS1 fuse I bought is rather huge and will not fit in the case unless you wire it up further away (like on the top of the mobo). It's not a SMD, sorry. If you're still interested write me a PM.

Thanks a lot for the help guys!

Nek

[dungbeetle46]

it sounds like the wiring is round the wrong way on eject button, like if you look at it and its 1-5 maybe you have soldered 5-1
dont know check it anyway

[nektheheck]

I checked the wiring order. It seems ok. The other way around I just get no reaction at all. I also checked the ribbon connection on some pics I got from the installation diagrams for the crystal chip and the wires are plugged in the correct direction.

There is something that I noticed though: I kinda soldered a lot off one of the components to which one wire is connected to. I can't really tell what it is. It looks like a fuse to me and it measures 0 Ohms when I test it. I will post a picture tomorrow so you can take a look. (It's a small black SMD with no visible numbers)

Thanks,

Nek.

[HypERSoniC]

i dont really know anything else to sujest, apart from that maybe some pins are not connecting properly or are in the wrong order.

if it measures 0 ohms, its probably a fuse...

heres a fuse diagram for you, just double check you have gh-032

[nektheheck]

Hi,

I unsoldered the wires I used to replace the ribbon and tried powering up from the mobo. I read in this forum that you could power up by connecting the switch pin to ground. It did not work (I tried connecting each wire to ground since I don't know which the exact power-on pin is).

Here's a picture of the connecting section.

Cheers,

Nek

[HypERSoniC]

hmm thats not looking too good.. yes you can ground out the switch, but i think this only works when powering off (??)

maybe that damadged component has something todo with the signal not getting to the syscon (mechacon in your console).

i cant seem to locate that component on the gh-032 diagram. do you have a gh-032?

[nektheheck]

Hmm, Ok. I will try to rebuild the cables once more *sigh. I'm thinking of getting replacement brackets for this thing. The more I solder the more I destroy the circuit. The diagram you mean only shows the bottom of the mobo. The connector is on the top side though (on the right bottom corner). I have a GH-037-22 board.

I just bought a malfunctioning pstwo from ebay for 23 Euros. The guy wrote that the unit would turn on but did not read any discs. Maybe I can fix one of the consoles and use the other for spares.

Thanks for the help!

Nek

[HypERSoniC]

ahh i see..

best of luck! probably just a bad lazer on that other ps2..