GameBoy DMG-01 isn't loading Games at all

[Rufos86]

Yes, chips are the same, i doubt both are broken. If this does not work the DMG-CPU internal RAM is probably gone and you need to replace the full chip.

i guess it's gonna be my last try , i'll swap the chips and see if there is any change, hopefully there will be , worst case i have parts in really good condition for the next DMG

 

[Rufos86]

so i swapped the 2 chips and now its even worse .

there is sound but the screen is fucked up .

is it possible to buy thous chips anywhere ?

thanks
D

 

[asper]

Well if the sound is correct (I mean you get past the "coin" sound during Nintendo logo) that's a good point ! If you do not get past over this you can see which chips were used in many of the DMG models and see if you can find one (or 2) somewhere (aliexpress, ebat, etc): https://gbhwdb.gekkio.fi/consoles/dmg/
(look at U2 and U3 column and check which one do you have - I don't know if all of them are interchangeable - "blob" ones are inside an epoxy resin but this is not your case).

Here it is a datasheet I found: https://www.ariat-tech.com/datasheet/ff/CY7C036A-15AC.pdf

EDIT: example https://www.ebay.it/itm/2pcs-LH5164A-10L-Sharp-Micro-64K-SRAM-Memory-100nS-NEW-LN5164-/153238126979 but you can find many others.

 

[Rufos86]

Well if the sound is correct (I mean you get past the "coin" sound during Nintendo logo) that's a good point ! If you do not get past over this you can see which chips were used in many of the DMG models and see if you can find one (or 2) somewhere (aliexpress, ebat, etc): https://gbhwdb.gekkio.fi/consoles/dmg/
(look at U2 and U3 column and check which one do you have - I don't know if all of them are interchangeable - "blob" ones are inside an epoxy resin but this is not your case).

Here it is a datasheet I found: https://www.ariat-tech.com/datasheet/ff/CY7C036A-15AC.pdf

EDIT: example https://www.ebay.it/itm/2pcs-LH5164A-10L-Sharp-Micro-64K-SRAM-Memory-100nS-NEW-LN5164-/153238126979 but you can find many others.

ohoo that's great , do you know what is the difference between LH5264N4 and LH5164LN-10 , it looks that there is many 5164 chips but no 5264 .

i can even get it on Aliexpress

https://www.aliexpress.com/item/400...earchweb0_0,searchweb201602_,searchweb201603_

thanks
D

 

[asper]

They seems to be very similar: https://html.alldatasheet.jp/html-pdf/42988/SHARP/LH5268A/257/2/LH5268A.html
(not the same chip ID but almost identical to the 5164 so I suppose it is an improved version of the 5264). Chek if pin distance is the same as the ones you have.

 

[Rufos86]

thank you for the help.

seems the same distance , so i guess ill order 2 chips and update when ever i get them .

the only difference that i notice is that the 5164 comes with long legs , but it's not supposed to be an issue .

if i'll manage to fix the Gameboy it will be a miracle.

D

 

[asper]

thank you for the help.

seems the same distance , so i guess ill order 2 chips and update when ever i get them .

the only difference that i notice is that the 5164 comes with long legs , but it's not supposed to be an issue .

if i'll manage to fix the Gameboy it will be a miracle.

D

Good, please let me know

I do not understand if, swapping chips, you get past the "coin" audio and you hear the normal game audio or if the console is hanged.

 

[Rufos86]

Good, please let me know

I do not understand if, swapping chips, you get past the "coin" audio and you hear the normal game audio or if the console is hanged.

its hanged , the only sound im getting is the coin sound , that's it

 

[asper]

its hanged , the only sound im getting is the coin sound , that's it

mmmmmm I hope you will fix it with the new chips; probably the wrong voltage damaged them but it is also possible a damage of the main CPU. Good luck !

 

[Rufos86]

mmmmmm I hope you will fix it with the new chips; probably the wrong voltage damaged them but it is also possible a damage of the main CPU. Good luck !

thanks , i will update when i get the new chips .

D

 

[pat011988]

Hi Rufos, did you made it work?