REPAIR GUIDE - TurboExpress/PC Engine GT: Video Fix

[nodtveidt]

Dead pixels are unfixable, but stuck pixels seem to be fixable in some cases. As for the screen, I've now managed to tear a TE completely apart, so I can study how the screen works and see if a replacement screen can be used. There's always the possibility of molding new plastic shells and using newer, larger screens, while in the process, reducing battery usage. I'd even like to find a way to attach the backup RAM, but that's more than likely a pipe dream.

[nat]

I'm currently running the program on a PC Engine GT that I own. It has two stuck pixels. So far, no luck. I'm wondering how long I ought to let it run. I'm running it on "FAST CYCLE" right now.

...still no luck, just switched to SLOW CYCLE...

Oh well, no luck. Tried it on two units (one of them was yours). It was worth a try, I guess.

[WoodyXP]

Thanks for posting this, Nat.  I'll keep this thread in my back pocket in case mine goes bad. *crosses fingers* 

[Sinistron]

Well I got my express back from Nat yesterday (QUICK turnaround) and I must say  everything is in fine form, screen is working stellar, sound issue is fixed, and Nat even fixed a stuck pixel- a surprise that I wasn't expecting.  Played some Hero Tonma on it yesterday and I am a very happy camper. 

Thanks again Nat. 

[chop5]

did it today works perfect! thanks nat    saved a tg expres from the dumpster.  I used a 4.7 50v cap i had laying around the house (was too lazy to go to radio shack)

[turbokon]

Thanks nat.  I'm going to add this to my list of services.  I hope you don' t mind.

[nat]

Ha, of course not. Share the wealth. 

[Jitawa]

I've gotta say, I'm really looking forward to having a working express again.

[imnes]

Was attempting this repair and I think I overheated the component, the solder pad for the positive side of the capacitor pulled away from the board.  Where else can I attach the positive lead of the capacitor to repair this?

[chaoticjelly]

I actually posted the same information in October of last year, but didn't create a breaking news thread 

http://www.pcenginefx.com/forums/index.php?topic=3686.0

[Necromancer]

I actually posted the same information in October of last year, but didn't create a breaking news thread 

Not quite the same information, as nat narrowed it down to a single culprit and provided pretty pictures. 

[Turbo D]

I would like to thank Nat for narrowing it down to one capacitor. If it wasn't for Nat, I would have had to replace every freaking cap on that damn pcb! It was an easy fix to do, thanx Nat! 

[nat]

Sure guys, no prob...

And I was gonna say! I actually looked at that thread when I was trying to figure it out, and I was just now about to hit my head against the wall if the answer had been there the whole time and I simply overlooked it.

[Duo_R]

I see how you remote mount. Is there just enough space to mount SM caps on this thing? Anyone know a trick how to solder SM caps on VS having to use wires?

Also, can you post the list of caps values and quantities that I will need to order (I will probably just want to replace all of them since there aren't that many)?

[Duo_R]

Here is how I installed my cap, I am using a technique that doesn't require the use of wires (I realized that you didn't use wires on the video cap, but you can do the same thing for the sound fix)..