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Moderated by: Robert

EurAsia : Index PS2 Modbo 4.0 not booting backups/imports on PS2 GH-051-02 (SCPH-77008)
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Author Modbo 4.0 not booting backups/imports on PS2 GH-051-02 (SCPH-77008)
PCM



private

Registered: 2010-12-22
Messages: 9
Status: Offline
 _#35697 posted 2017-10-07 @ 12:34 GMT   
Hello!

I'm having issues with Modbo 4.0.
I've tried two Modbo 4.0s, V1.93 and V1.99, and both are not booting backups nor imports on PS2 Slim SCPH-77008 with GH-051-02 motherboard.

With both modchips I'm getting Matrix logo, can enter modchip settings and change/save them, PS1 backups, PS1 and PS2 originals boot perfectly fine (PS2 originals boot with patched PlayStation 2 logo), but not imports nor backups. All I'm getting is "The disc could not be read".
With what seems to be 1% chance, import disc (NTSC-U) will authorize and work just fine on Modbo V1.93. I don't have the patience to test this with Modbo V1.99, but I think it behaves the same.
And while with backups I can blame the discs or my DVD writer, I can't think of a reason for non-booting imports. I have only one import though, so I can't really be sure...

I've tried to rework ABGHI wires a few times, and it didn't help, the behaviour hasn't changed at all.
Here are the photos of some of my attempts:
Modbo 4 V1.93
https://i.imgur.com/64E0KHa.jpg
Modbo 4 V1.99 (current)
https://i.imgur.com/ftgpC7b.jpg
All connections on every attempt were thoroughly tested with a continuity tester, so no problems there.

Is it my installation or some kind of issue with the motherboard?
I'm sure some kind of a modchip was installed on this motherboard before. I've found scraped solder mask and traces of solder on vias before installation, but this PS2 was sold to me as unmodded. Looks like it had modchip that used internal oscillator because CX via had solder mask intact.

Thanks for the help.

[ This message was edited by PCM on 2017-10-08 @ 00:01 GMT ]

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modrobert



donor

Registered: 2003-10-17
From: Bangkok
Messages: 6224
Status: Online
 _#35698 posted 2017-10-08 @ 04:51 GMT   
What happens with the import (or backup) if you enable fast boot for PS2 games by holding [SELECT] on joypad in port 1 after powering on? Also, I want to know exactly how you burn the backups; what media/brand used, software, burner, etc.
  _____________________________ ____________     __________________ /\________
  \    __________________      \      _____/____/     _    \       /_        /
 /     /       |       l/     _/    ____)     _/      _     \     \/  cREAM /
/______________l_______/       \______________\_______|      \_   /________/
 -+--Mo!-------------- \________/ ------------------- l_______/_____\ -----+-

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PCM



private

Registered: 2010-12-22
Messages: 9
Status: Offline
 _#35700 posted 2017-10-08 @ 10:03 GMT   
With imports and backups it just sits on Matrix logo, the disc stops spinning after a ten or so seconds.
Just for the sake of it, I tried burning PS2 CD game on a high-quality Verbatim AZO CD-R (Mitsubishi Chemical) I have lying around, and it authorized perfectly on the first try!
Though I remember reading that security checks for PS2 CDs somehow differ from checks for PS2 DVDs...

I was only able to secure TDK DVD+R 16X (MBIPG101-R05-01), and these aren't exactly the greatest.
Burned two of them on Liteon iHAS124 with ImgBurn for Windows on AWS speed (in reality it was ~6-8x). I also tried forcing the booktype to DVD-ROM and burning the disc on 8x, same story.

I'll get some high-quality Verbatim AZO DVD-Rs and DVD+Rs tomorrow.
Any recommended burning settings? Seems like everybody has their own opinion on that.

[ This message was edited by PCM on 2017-10-08 @ 13:32 GMT ]

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modrobert



donor

Registered: 2003-10-17
From: Bangkok
Messages: 6224
Status: Online
 _#35701 posted 2017-10-08 @ 13:51 GMT   
Liteon iHAS124 with ImgBurn is OK, use DVD-R (+R have different leadout), Verbatim is good, anything with dark media surface and burn at one speed step over slowest (if your burner can do 2x, burn at 4x, and so on).
  _____________________________ ____________     __________________ /\________
  \    __________________      \      _____/____/     _    \       /_        /
 /     /       |       l/     _/    ____)     _/      _     \     \/  cREAM /
/______________l_______/       \______________\_______|      \_   /________/
 -+--Mo!-------------- \________/ ------------------- l_______/_____\ -----+-

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modrobert



donor

Registered: 2003-10-17
From: Bangkok
Messages: 6224
Status: Online
 _#35702 posted 2017-10-08 @ 13:54 GMT   
Another thing, if you download the game images, make sure it's not for emulator pack, as those can be incomplete or patched dumps.
  _____________________________ ____________     __________________ /\________
  \    __________________      \      _____/____/     _    \       /_        /
 /     /       |       l/     _/    ____)     _/      _     \     \/  cREAM /
/______________l_______/       \______________\_______|      \_   /________/
 -+--Mo!-------------- \________/ ------------------- l_______/_____\ -----+-

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PCM



private

Registered: 2010-12-22
Messages: 9
Status: Offline
 _#35703 posted 2017-10-08 @ 17:32 GMT   
Quote:
On 2017-10-08 @ 13:51 GMT, modrobert wrote:
Liteon iHAS124 with ImgBurn is OK, use DVD-R (+R have different leadout), Verbatim is good, anything with dark media surface and burn at one speed step over slowest (if your burner can do 2x, burn at 4x, and so on).


Quote:
On 2017-10-08 @ 13:54 GMT, modrobert wrote:
Another thing, if you download the game images, make sure it's not for emulator pack, as those can be incomplete or patched dumps.



Okay, thanks. I'll try that as soon as I'll get the discs.
These images work fine on this very same PS2 with Open PS2 Loader.
I'll try to dump some game myself and then burn it to DVD-R if the regular image won't work.

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PCM



private

Registered: 2010-12-22
Messages: 9
Status: Offline
 _#35704 posted 2017-10-09 @ 22:00 GMT   
Quote:
On 2017-10-08 @ 17:32 GMT, PCM wrote:
Okay, thanks. I'll try that as soon as I'll get the discs.
These images work fine on this very same PS2 with Open PS2 Loader.
I'll try to dump some game myself and then burn it to DVD-R if the regular image won't work.



Sadly, this didn't help. Both Verbatim DVD-Rs and DVD+Rs (MCC) do not work, PS2 is still showing "The disc could not be read" or hangs on Matrix logo if SELECT is held on boot.
I ripped my disc of GTA: San Andreas with Alcohol 120% and PS2 behaves a little bit differently with the image burned on DVD-R. It spins the disc faster for a little while, and sits longer on "Reading disc", but fails anyway.

So, I take it the problem is not with modchips or motherboard? Could it be a laser issue?

[ This message was edited by PCM on 2017-10-09 @ 22:14 GMT ]

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hacktheplanet



lt

Registered: 2017-03-12
Messages: 71
Status: Offline
 _#35705 posted 2017-10-12 @ 13:52 GMT   
It very well could be the laser. Try just cleaning the laser lens with a q-tip and a tiny bit of rubbing alcohol (just enough to make the q-tip lightly damp). If that doesn't work, you might have to tweak the DVD laser potentiometer to squeeze more life out of it

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PCM



private

Registered: 2010-12-22
Messages: 9
Status: Offline
 _#35706 posted 2017-10-12 @ 18:36 GMT   
Quote:
On 2017-10-12 @ 13:52 GMT, hacktheplanet wrote:
It very well could be the laser. Try just cleaning the laser lens with a q-tip and a tiny bit of rubbing alcohol (just enough to make the q-tip lightly damp). If that doesn't work, you might have to tweak the DVD laser potentiometer to squeeze more life out of it



Thanks for the answer!
I already tried cleaning the lens with alcohol. It didn't help.
I ordered a new laser assembly just to be sure. In the meantime, I'll try to adjust the laser pot.

Hm-m-m, I've measured the DVD pot, and it was set to 697 Ohms. According to adjustment guides, it's a tiny bit lower than the lowest safe resistance (700 Ohms). I suspect the previous owner already did this.

[ This message was edited by PCM on 2017-10-12 @ 19:12 GMT ]

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hacktheplanet



lt

Registered: 2017-03-12
Messages: 71
Status: Offline
 _#35715 posted 2017-10-16 @ 16:55 GMT   
It's almost never going to be 100% accurate when you measure it in practice. 700 ohms is the ideal value it "should be." 697 is certainly within tolerance. It prolly hasn't been tweaked at all

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PCM



private

Registered: 2010-12-22
Messages: 9
Status: Offline
 _#35717 posted 2017-10-16 @ 18:11 GMT   
Quote:
On 2017-10-16 @ 16:55 GMT, hacktheplanet wrote:
It's almost never going to be 100% accurate when you measure it in practice. 700 ohms is the ideal value it "should be." 697 is certainly within tolerance. It prolly hasn't been tweaked at all



Of course it's not 100% accurate. According to some gudes and forum posts, the normal value is around 750-850 Ohms, and that's why I think it was tweaked before.
What I'm saying is that it's already near the lowest safe resistance, and I don't want to burn the laser completely by going lower.

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hacktheplanet



lt

Registered: 2017-03-12
Messages: 71
Status: Offline
 _#35718 posted 2017-10-17 @ 17:37 GMT   
Oh sry, I misunderstood what you meant. Well the new laser assembly should certainly do the trick

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