GBA SP (AGS 001) Screen Connector Problems

Vector273

Member
OP
Newcomer
Joined
May 15, 2022
Messages
12
Trophies
0
Age
29
Location
Germany
XP
12
Country
Germany
Hello everyone!
I just bought a defective GBA SP after succesfully repairing a few GB Colors, Advances and an original. After receiving the SP i quickly noticed that the Screen was not working. I got a working one here so i used the Screen to test the mainboard but still no success. I googled a bit and found nothing helpful so i came here to share my sorrow and hope for help.
Do you guys think it makes sense to reflow the screenport? Or switch it completely?
 

MichiS97

"Leftist snowflake milennial"
Member
Joined
Jun 14, 2011
Messages
1,757
Trophies
1
Age
24
Location
Munich
XP
2,953
Country
Germany
Hiya,

to be honest I don't think the connector is at fault here if there is no visible physical damage. Can you upload some pictures of the mainboard and closeups of the port?
 

Vector273

Member
OP
Newcomer
Joined
May 15, 2022
Messages
12
Trophies
0
Age
29
Location
Germany
XP
12
Country
Germany
Sure thing, here we go:
PXL_20220515_132449180.MP.jpg
 

patters

Well-Known Member
Newcomer
Joined
Jan 28, 2006
Messages
97
Trophies
0
XP
389
Country
Have you checked continuity across the fuse? There's a fuse near the power switch I believe which blows if there's a short. I think this is often blown if there is water ingress. There are YouTube videos showing this kind of repair.
 

Vector273

Member
OP
Newcomer
Joined
May 15, 2022
Messages
12
Trophies
0
Age
29
Location
Germany
XP
12
Country
Germany
Have you checked continuity across the fuse? There's a fuse near the power switch I believe which blows if there's a short. I think this is often blown if there is water ingress. There are YouTube videos showing this kind of repair.
Now i think i got the reply working, sorry!
 

tech3475

Well-Known Member
Member
Joined
Jun 12, 2009
Messages
2,878
Trophies
1
XP
3,979
Country
Things I can think of:
1) Try the 'faulty' screen on another working unit
2) Check the voltages on the pins for the connector (remember the light can be changed)
3) Visually check the solder joints with a magnifying glass

Found some schematics, don't know how valid they are.
 

Vector273

Member
OP
Newcomer
Joined
May 15, 2022
Messages
12
Trophies
0
Age
29
Location
Germany
XP
12
Country
Germany
Things I can think of:
1) Try the 'faulty' screen on another working unit
2) Check the voltages on the pins for the connector (remember the light can be changed)
3) Visually check the solder joints with a magnifying glass

Found some schematics, don't know how valid they are.
1) The faulty Screen works on another unit, without flaw.
2) I will get to that, wich pins should i check? Could you share your Shematics?
3) Checked them, they look good, not different from a working unit...
 

tech3475

Well-Known Member
Member
Joined
Jun 12, 2009
Messages
2,878
Trophies
1
XP
3,979
Country

Vector273

Member
OP
Newcomer
Joined
May 15, 2022
Messages
12
Trophies
0
Age
29
Location
Germany
XP
12
Country
Germany
I'd then follow the schematics to find out where the voltage should be coming from and where it stops.
I did, and i got the backlight up and running again!
But nothing else. I attached the speaker and can hear the startup sound when i turn it on, together with a working backlight. But noch Picture whatsoever. I am starting to fear it could be a completely faulty mainboard.
 

Robika

Well-Known Member
Member
Joined
Mar 14, 2010
Messages
409
Trophies
0
Age
31
Location
Spain
XP
1,664
Country
I did, and i got the backlight up and running again!
But nothing else. I attached the speaker and can hear the startup sound when i turn it on, together with a working backlight. But noch Picture whatsoever. I am starting to fear it could be a completely faulty mainboard.
I have a an SP with the same issue. I will be out of town till Tuesday next week but I can chip in with the testing and see if we can figure something out.

Same Issue, console boots, sound is fine I have back light but image is almost invisible. I will upload images later.
 

Vector273

Member
OP
Newcomer
Joined
May 15, 2022
Messages
12
Trophies
0
Age
29
Location
Germany
XP
12
Country
Germany
I have a an SP with the same issue. I will be out of town till Tuesday next week but I can chip in with the testing and see if we can figure something out.

Same Issue, console boots, sound is fine I have back light but image is almost invisible. I will upload images later.
That would be great, thanks!
I think if you can barely see something you could try to adjust the cintrast screw under the battery.
 
General chit-chat
Help Users
    Psionic Roshambo @ Psionic Roshambo: Solution for global warming, turn humans cold blooded