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V9 Black Screen –
I recently purchased a v9 ps2 off fleabay .The unit looks like new and after opening it,it appears to have had a chip mod that went horribly wrong ,lol.
Checked all the fuses and found and fixed one blown fuse (ps3) on the board so now the reset and eject appear to work ok,but all I get is a black screen,no menu.
Laser coils both test 5.2 ohms and I've scoured the board with a mag glass looking for shorts or bridges where there had been some previous soldering done but can't seem to find any.
I've read about it possibly being the oscillator but unsure as to its location or how to test it.
Any help would be appreciated,thanks.
Ya I've checked those carefully as well as the cd/dvd controller chip.Swapped the oscillator out as well,still no joy.When I have it hooked up to the tv and hit reset the screen flickers but stays black. The laser does move and blink and the drive does spin up if I have a disk in it.Just not sure what to be meter out without a schematic.
Damn thing has me stumped.
try checking all the voltage regulators - afaik there are 2x 5V, and 1x 8V regulators. Check that the are outputting the correct voltage.
Thanks for the reply.I hooked up a bench power supply to the board,the 8v and 5v regs all are good.I keep coming back to thinking there is a short somewhere but I just can't find the damn thing,lol.If you any any more ideas let me know.Thanks again.
i have the same problem with my v9, but unfortunetly i dont know as much about computer boards as you do so i dont think i can solve my problem, all i can do is check the fuses...but if u find a fix let me know so i might be able to try it also. thanks
After 3 days of staring through a mag glass and looking at different mod chip install pics I found the problem. One of the the mod chips I looked at uses a test pad at the end of a tiny surface mount 47 ohm resistor for the clock signal and the end of the resistor must have gotten hot enough to burn off the solder contact on the bottom of it.
It looked ok and tested ok if you checked across the top of it,but not at the base of the resistor.Dental picks, alligator clipped to the meter test leads is a handy thing
Replaced the resistor and then did the 5v mod for the LA chip.Life is good again!
I attached a couple of pics if it helps anyone.
Congrats. Sure does feel good when you get the thing working!