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NEC TG-16/TE/TurboDuo => TG/PCE Repair/Mod Discussion => Topic started by: jelloslug on May 19, 2015, 01:16:08 AM

Title: TG-16 with video memory problem
Post by: jelloslug on May 19, 2015, 01:16:08 AM

I have a Turbo that has a problem with the video memory. It had garbled graphics when I first got it and tapping on the left video ram chip made the graphics change. I reflowed the chip and the problem went away (or so I though). After playing the system for half a hour or so the garbled graphics slowly started to come back to the point that they were at when I first go the system. If I reflow the chip again the whole process starts over. Any thoughts?

Title: Re: TG-16 with video memory problem
Post by: Keith Courage on May 19, 2015, 10:54:35 PM

could be a bad chip but most likely it is a bad trace in between the two ram chips or a trace from one of the ram chips to the HU6270.