Duo-R with Graphic Glitches

[LowRes]

I have a Duo-R that has graphic glitches once you start playing a game.  The loading screen is fine, you can load a game no problem and even the title screen of the games seem to be fine, but once you try to start playing, the graphics are all messed up.  Should I start with swapping out the ram chips?  does this sound like a ram issue?

[thesteve]

I have a Turbo Duo-R that has graphic glitches once you start playing a game.  The loading screen is fine, you can load a game no problem and even the title screen of the games seem to be fine, but once you try to start playing, the graphics are all messed up.  Should I start with swapping out the ram chips?  does this sound like a ram issue?

It depends actually
Likely a ram issue, but in most cases it's the traces not the chip
Which chip can often be determined by the specific image that's corrupted on certain games

Sent from my HTC One_M8 using Tapatalk

[LowRes]

I have a Turbo Duo-R that has graphic glitches once you start playing a game.  The loading screen is fine, you can load a game no problem and even the title screen of the games seem to be fine, but once you try to start playing, the graphics are all messed up.  Should I start with swapping out the ram chips?  does this sound like a ram issue?

It depends actually
Likely a ram issue, but in most cases it's the traces not the chip
Which chip can often be determined by the specific image that's corrupted on certain games

Sent from my HTC One_M8 using Tapatalk

am I correct to be looking at the 2 HSRM20256LM12 ram chips? or are there other ram chips on the board?  Prince of Persia for example works perfectly except the sprite for the character is missing, Dracula X has a lot of random glitches, the Title screen looks good except the red writing is missing

I would link to some pics but for some reason photobucket is asking to upgrade my account to do so.  I'll have to find another hosting site

thanks for the help

[thesteve]

I have a Turbo Duo-R that has graphic glitches once you start playing a game.  The loading screen is fine, you can load a game no problem and even the title screen of the games seem to be fine, but once you try to start playing, the graphics are all messed up.  Should I start with swapping out the ram chips?  does this sound like a ram issue?

It depends actually
Likely a ram issue, but in most cases it's the traces not the chip
Which chip can often be determined by the specific image that's corrupted on certain games

Sent from my HTC One_M8 using Tapatalk

am I correct to be looking at the 2 HSRM20256LM12 ram chips? or are there other ram chips on the board?  Prince of Persia for example works perfectly except the sprite for the character is missing, Dracula X has a lot of random glitches, the Title screen looks good except the red writing is missing

I would link to some pics but for some reason photobucket is asking to upgrade my account to do so.  I'll have to find another hosting site

thanks for the help

If it works correctly on cards, the hsrm20256 are fine
It actually has 4 CD related ram banks
And 2 core system banks
Each bank is 1 or 2 chips

Sent from my HTC One_M8 using Tapatalk

[LowRes]

I have a Turbo Duo-R that has graphic glitches once you start playing a game.  The loading screen is fine, you can load a game no problem and even the title screen of the games seem to be fine, but once you try to start playing, the graphics are all messed up.  Should I start with swapping out the ram chips?  does this sound like a ram issue?

It depends actually
Likely a ram issue, but in most cases it's the traces not the chip
Which chip can often be determined by the specific image that's corrupted on certain games

Sent from my HTC One_M8 using Tapatalk

am I correct to be looking at the 2 HSRM20256LM12 ram chips? or are there other ram chips on the board?  Prince of Persia for example works perfectly except the sprite for the character is missing, Dracula X has a lot of random glitches, the Title screen looks good except the red writing is missing

I would link to some pics but for some reason photobucket is asking to upgrade my account to do so.  I'll have to find another hosting site

thanks for the help

If it works correctly on cards, the hsrm20256 are fine
It actually has 4 CD related ram banks
And 2 core system banks
Each bank is 1 or 2 chips

Sent from my HTC One_M8 using Tapatalk

unfortunately the card slot has been hacked up so I'm unable to test if hucards work without the glitches so I can't rule out the HSRM20256 chips, can you tell me the location of the 4 cd ram banks? so a total of 8 ram chips for CD?

[thesteve]

Not offhand on the R
Hacked up card slot could be the only issue, so start there

Sent from my HTC One_M8 using Tapatalk

[LowRes]

Not offhand on the R
Hacked up card slot could be the only issue, so start there

Sent from my HTC One_M8 using Tapatalk

ok so I replaced the card slot and I now have Hucards working but with the same missing sprites and corrupted graphics as the CD Games so I think that confirms my problem is with the HSRM20256LM12 chips.  I'm going to get a friend of mine to swap those out from a parts board and hopefully all will be fixed on this board and I'll have saved another Duo

replacing the surface mounted ram is a little out of my skill level, but replacing the card slot tonight was pretty fun lol

thanks for your help in narrowing it down

[thesteve]

It now is either the 20256 ram, the HuC6270 or the connections between

Sent from my HTC One_M8 using Tapatalk

[thesteve]

As I said before, the connections are the most likely fault

Sent from my HTC One_M8 using Tapatalk

[LowRes]

An update on this.  It ended up being the HuC6270 had a broken pin, only noticed it when I had my buddy replace the chip with a known working chip off a parts board.  I think we finally figured out my problem.  Took so long cause I had to get a friend to deal with these surface mounted chips since I'm not good enough to do that kind of work and he's been super busy.

in other news I somehow lost the power button switch! the case has been laying on my desk for so long with the screws and power button and now it has dissapeared! always something.  Anybody know of anywhere I might be able to get a replacement?

[MNKyDeth]

I think I got rid of my extra duo-r shell. But I will check my parts and pieces to see if I have an extra one.

I'll let you know sometime tomorrow if I have one or not as I am at work now for the next 12'ish hours.