PS2 with MDBO V2.1 hangs when chip disabled

[smiler]

Hello

I'm new here and i hope to find some help with the following problem.
I own a Fat PS2 (SCPH-30004 R which is a PAL-Version with a GH-013 Board) with a MODBO V2.1 Modchip. After fixing some problems with spareparts of other PS2 i had here around (Changeing the lensloop because of burned coils and adjusting the laser potentiometers to 1100 Ohms(now perfect reading PS1 and PS2 games and backups),Modding with the chip i found in another PS2 (i searched in the web where to mount it and mounted it at the best place with shortest wiring connections)) .
When I wanted to test the PS2 i noticed that when i press start(controller) while switching on the box the chip shows "Disabled" what is correct so far, but then it hangs and nothing happens, when I reset my PS2 the Chip is activated again and works fine. The Problem is that i am not able to boot the PS2 normaly without chip, because it does not matter how short the time is I press the Reset-Button it is everytime a full reset.
I tried to change the resistance between reset-Pad and modchip from 33K (normal chip setup) Ohms up to 500 k Ohms in two steps of 250 k Ohms without efect, I tried to connect without resistor (0 Ohms) without effect and I tried to solder the G (not neccessary until V8) and H (for NTSC Versions) pins which normaly are not used in my Version to ground without effect.
So I hope some of you have some other Ideas to fix my problem.

Now I also tested to use better Ground and VCC (3,3V) wirings also without effect, now I am really going crazy.

[l_oliveira]

The solution is take that MODBO piece of trash out and put a real Matrix Infinity chip.

If for any reason you need the PS2 without modchip, just remove the MODBO and use FMCB and ESR instead.

There's no point on having modchip anymore.

[smiler]

I want to thank you for this technicaly perfect explained solution for my problem and I am very surprised about the high technical cualification you seem to have, congratulations.
I also use ESR and FMCB, but a MOD-Chip makes it a lot easier to play around with these and other tools like launchELF etc.
So i will try to fix the problem with a new Idea I Had today and I will tell more about the results in my next posting.
Maybe some other people have the same Problem and will find this thread with a more cuallificated and better described sollution than I found.

[smiler]

The last Idea I had finaly was the solution. Now when I start my PS2 holding the start-Button on the controller "Disabled" appears on the screen and by short reset ( just tipping the Reset-Button) the PS2 boots without chip until I switch it of or until I press the Button for nearly one second.
The solution was a 660nF Kondensor from the Reset-Pad on de MODCHIP-Board (Using some empty and not connected solder-Pads on it I guess where added for designchangeings like this) to Ground loaded by a 250 kOhm Resistor so that while a short Reset (Reset is grounding the Reset-PIN so the Reset-Pin goes from high to low) the 3,3 Volts (high-Signal) stays stable for little bit longer.

original setup:
Reset-Pad on Chip-Board ()--------[33kOhm]--------o Reset-Pin on the Chip

New setup whith Kondensor and Resistor:
Reset-Pad on Chip-Board ()--[250kOhm]-----[33kOhm]--o Reset-Pin on Chip
-----------------------------------------|
---------------------------------------__|__
-------------------------------------- _____ 660 nF Kondensor
-----------------------------------------|
---------------------------------------__|__ Ground

[Bootlegninja]

The solution is take that MODBO piece of trash out and put a real Matrix Infinity chip.

If for any reason you need the PS2 without modchip, just remove the MODBO and use FMCB and ESR instead.

There's no point on having modchip anymore.

I have to agree. the old modbo chips were and still are horrible. ESR has made it possible to play almost any game from disc without swapping. and between HDL and OPL (OPS2L), there's really no need for a mod chip anymore unless you want to play ps1 games. And at that, it's best to pick up a ps1 system for virtually nothing and throw a cheap PIC mod chip lile stealth4, MM3 or even the old crow.

[smiler]

Yes I know that Matrix Chips are better but Modbos are cheaper. And I did not buy anything new for this I only wanted to get my old stuff work. I am not a gamer, for me these little technical problems and their solution are more interesting. And I have to say that to read answers like this there is no need to open a thread, somebody who posts a problem like I did has just decided not to throw away any "piece of crap", but to get new ideas to solve the problem. Answers like the first I read here are normaly a sign that show how uncuallified the author is. As you can see in my last posting there was a very cheap and logical solution that everyone with a little bit of technical know how could have found and now the chip works perfect. I even have no application that makes it necessary to boot without the chip I only wanted to get it work.

[dlanor]

@smiler:
I understand your position, and I see nothing wrong with you wanting to develop a working solution for the hardware you had. That is only natural.

But I do have a problem with your snap-judgement of l_oliveira, which is both laughably incorrect (him 'unqualified'...? Not likely!) not to mention hostile in a way totally uncalled for. Once you've spent a little more time in this site, and seen some of the stuff he's involved in, I'm sure you will realize this yourself.

The sarcasm in your second post (post #3) is practically dripping with venom, which is quite inappropriate considering that his advice in post #2 was clearly well intended and quite neutral in tone except for his rejection of the modbo chip as 'trash', though I also understand why he and many others feel that this is true. But that rejection was directed against the IC, not against you, so there is no reason for you to take it as a personal insult, though it is very clear from post #3 and your further comments in post #6 (your 4th post) that you did take it so.

Surely a difference of opinion about an IC is no reason to start some kind of feud.
So lets stop that right here, and try to handle future disagreement by proper discussion, without unmerited sarcasm.

Best regards: dlanor

[smiler]

I understand what you mean and you are right I took it to personal and I overreacted. The problem is that before I posted my problem I searched in a lot comunities for similar problems and I did not find anything than such useless postings. I am not a friend of this amarican way of amarican engineering like I call it, I mean this kind of trial and error and changing a not functioning blackbox before understanding the cause of the malfunction. In my case for example it was a 20 or 30 cent costing solution and now the chip works as good as others and the cause I post threads is not only to get help, it's also to give help to others using the right keywords searching in the web with the same problem. This was meant as an explanation and not as a new attack. I hope you will also understand that the used words where provocative not only from my side.

[l_oliveira]

Smiler, the whole issue with the MODBO product is that the Chinese people involved with it's production decided to use a cheap PLD chip which does not have enough room for all the functions a real Matrix modchip has.

A few things they left out:

- Recovery mode
- Ripple detection on the reset line (yep the Matrix does the same thing as your capacitor fix, but in software, within the Actel CPLD)
- Disable function (yes, it does not work, give it a try.)

And in some cases (earlier versions) it does not even store the configuration properly on the flash or just hangs and stop working if you try to.

Also, simply by having modchips fitted, you're risking frying the tracking coils or the laser diode of your optical pickup.

The PS2 DVD drive hardware is designed in a way that both the laser diodes intensity and the actuator coils are controlled by the firmware, causing them to be left on in maximum current if the DVD drive micro controller (Mechanics Controller or MECHACON) crashes, freezes or detect tampering.

Sometimes (this on earlier consoles such the 10000/30000 series) it does not freeze but even so it turns on the coils on maximum power when detect tampering. ALL PS2 models are subject to actuator coils or laser diode burns caused by modchip patching errors.

Poor wiring contribute to make this problem more serious.

Did I mention the problem with EEPROM corruption caused by poor modchip installs ?

[aboahmad592]

We have here in Egypt we find that the best Alrkaiqmodbo 4.0 or m-7 gp-788xl They are most common in the amendments now we have two problems Kulailta