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[Console Repair/Mod Center / Re: REPAIR GUIDE - TurboExpress/PC Engine GT: Video Fix]

I've seen something similar happen when the 1 10uf cap pads get ruined but not exactly the same. Also, are you by chance using a generic ac adapter? Does the same thing happen on batteries? I wonder if this is the sign of an actual bad screen.

The burn in on the screen is completely normal.

I will recheck the 10uf again. No I first tried this unit reassembled on batteries and noticed the problem, since then I have been trouble shooting it partially disassembled with power from a 1st party NEC TE AC adapter. That would kinda suck if the screen has a legit problem, Though it might be nice to upgrade to a newer LCD.

[Console Repair/Mod Center / Re: REPAIR GUIDE - TurboExpress/PC Engine GT: Video Fix]

Insulation of that part shouldn't effect anything. I've never seen flickering like you described. Maybe you should post some pics of the graphics issues? Could be bad ram/or damaged trace related.

Also, in the past I've accidentally uncovered the part you speak of before and have even broken off a leg/contact point before. I've always just re-soldered the wire back to where it originally went without any ill effects. Then cover up with hot glue or epoxy. So hopefully neither of the two contact points for the coil have snapped off anywhere.

Thanks for the advice KC. I tried some additional trouble shooting (different caps, reflow on solder pads) with no change. I posted a couple private videos to YouTube showing the pulsing flicker issue, here are the links:

Video 1: wayback://youtu.be/MevovLPARy0
_{(Turbo Express recap screen flicker - Recapped my Turbo Express and now there is pulsing flicker, more noticeable with the contrast down low)}
Video 2: wayback://youtu.be/g9rXBf_rj4E
_{(Turbo Express recap screen flicker video 2)}

If you look carefully in the first video you can also notice that there is a temporary burn-in on the screen that carries over from whatever is displayed previously, so in the video you can see the Keith Courage title screen still faintly showing on the screen once the game starts.

I rechecked the traces as well and couldn't find any issues, though it seems like that could possibly be causing the issue, or maybe the ribbon cable from the hu-card reader to the main board? What do think from the videos?

Thanks

[Console Repair/Mod Center / Re: REPAIR GUIDE - TurboExpress/PC Engine GT: Video Fix]

Hey y'all, I just did a recap on a TurboExpress which had stopped working (This was my 2nd time repairing one of these, 1st one came out great). This time around went a little different. When I was trying to carefully remove the portions of white glob that were covering the solder pads of the caps in the corner, there was a large piece that broke off and took a piece of the black plastic top off the copper coil pack hidden under that white goop. So I assumed this goop was acting as a insulator for the coil/glue for the 100uf 16v caps that it runs into. I attempted to use hot glue to repair this and continued the recap job.

Once I reassembled and tested the unit, I found the screen to flicker and get distorted with pixels in improper places. After double checking all of the solder points and some other trouble shooting without the back half of the shell, I was able to get the distortion to stop but the light flicker continues to occur as if possibly a slight issue with the backlight. But I wonder if this is possibly related to that coil from under the white goop. Could this occur if it is damaged or not adequately insulated?

Thanks

[Console Repair/Mod Center / Re: Radial vs SMD capacitors on Turbo Express]

Cool, thanks for the feedback guys.

[Console Repair/Mod Center / Radial vs SMD capacitors on Turbo Express]

Hey guys, as you may have noticed I am new to the forums. There's probably been some discussion on this subject but I did a quick search but didn't find a specific thread for this...

So I was wondering what those in the TG-16/PCE community think about using radial capacitors in place of SMD on the Turbo Express/PCE-GT? As I have heard somewhere that you should replace SMD with new SMD. Are there any real pros to only using SMD besides that they may look and fit better?

Thanks guys