Dude, that is awesome!!! Congratulations... Enjoy your new PC...lol The only thing I might suggest, is when you flow the chip back on, don't lift your screwdriver immediately when you pull the soldering iron away.... Other than that, you're the king.
Amazing job! Glad to see that these beautiful gas plasma panels can be repaired with effort. I have an IBM P70 that has lines popping up intermittently (no permanent dead areas or permanent lines thankfully) so will give reflowing chips a shot first. As the screen warms up is when it starts acting up so I am assuming it's bad connections from constant warming and cooling. Definitely have hope now that I saw what you managed to do. What temp did you run your heatgun on?
Not sure but it was no higher than medium, was really scared of melting it. There is also a possible bad spot where the traces meet the glass sheet, it might work to heat there but so far I’m a bit worried to put heat there. I have a couple of traces that are bad there that I just put something next to the glass to keep pressure there.
Were you able to determine the relationship between each vertical line and each chip? I.e. does each line have one top chip and one bottom chip driving it? Or is each line only driven by one chip and they are interleaved? When I say "lines" in this context I mean all lines, not just the defective ones.
I'm currently doing this right now, I got four screens from someone on vcfd forums, two Toshiba and two compaq. Any tips? I'm currently struggling with mine, it seems that every time I solder a new one on it creates lines that weren't there before
It's not easy. You may be fixing some that now show, pre-existing but hidden, problems from another chip. You have to be very careful where the flexible trace sheet is attached near the glass also. It can go bad there too and so far I haven't found a good way to correct that. I ended up having a couple of lines bad at that point and temporarily fixed it by putting in a small piece of something to add just a bit of pressure on the trace near the glass screen. I WOULDN'T RECOMMEND IT. It may be fixable if I added some heat while I pressed the trace at its entry to the screen but I don't have the guts to try it.
I think RUclips keeps deleting my comments, but I ended up finding a lot of suppliers. The only problem is that the chips are bare minimum $5.00 a piece. The SN751518 I managed to get a quote for $1.65, but every other chip is upwards of $5.00. I'll post a comprehensive list of findings on the vintage computer federation forum when I'm done repairing these screens, RUclips keeps deleting my comments for posting links. A few things to note: horizontal chips almost never go bad, I only have two screens that have dead horizontal lines, and it's only one chip on those. The plastic frame ones usually have more dead chips compared to an aluminum frame screen. Aluminum frame screens are more likely to have severed ribbon cables because the aluminum warps and presses against the ribbon cable cutting it. The white packages can cause an entire section to go bad if one goes bad. I also don't know if any way to replace those white packages under the chips. The main thing I have learned from this repair is that if you bang your head against a brick wall enough times, it will eventually break.
Авто/Мото
Dude, that is awesome!!! Congratulations... Enjoy your new PC...lol
The only thing I might suggest, is when you flow the chip back on, don't lift your screwdriver immediately when you pull the soldering iron away.... Other than that, you're the king.
so #1 you are my hero! #2 I have at least 3 of these that need repair. Name your price!!!
so no price?
Impressive!! Nicely done!
Thank you!
Soviet engineers're with you
That’s bloody amazing. Love to know how many hours you put in. Cool channel :)
About 6-7 hrs throughout a week
Amazing job! Glad to see that these beautiful gas plasma panels can be repaired with effort. I have an IBM P70 that has lines popping up intermittently (no permanent dead areas or permanent lines thankfully) so will give reflowing chips a shot first. As the screen warms up is when it starts acting up so I am assuming it's bad connections from constant warming and cooling. Definitely have hope now that I saw what you managed to do. What temp did you run your heatgun on?
Not sure but it was no higher than medium, was really scared of melting it. There is also a possible bad spot where the traces meet the glass sheet, it might work to heat there but so far I’m a bit worried to put heat there. I have a couple of traces that are bad there that I just put something next to the glass to keep pressure there.
Were you able to determine the relationship between each vertical line and each chip? I.e. does each line have one top chip and one bottom chip driving it? Or is each line only driven by one chip and they are interleaved? When I say "lines" in this context I mean all lines, not just the defective ones.
Each chip runs about 8 lines or so. And yes they are interleaved above and below, and left and right.
I'm currently doing this right now, I got four screens from someone on vcfd forums, two Toshiba and two compaq. Any tips? I'm currently struggling with mine, it seems that every time I solder a new one on it creates lines that weren't there before
It's not easy. You may be fixing some that now show, pre-existing but hidden, problems from another chip. You have to be very careful where the flexible trace sheet is attached near the glass also. It can go bad there too and so far I haven't found a good way to correct that. I ended up having a couple of lines bad at that point and temporarily fixed it by putting in a small piece of something to add just a bit of pressure on the trace near the glass screen. I WOULDN'T RECOMMEND IT. It may be fixable if I added some heat while I pressed the trace at its entry to the screen but I don't have the guts to try it.
I think RUclips keeps deleting my comments, but I ended up finding a lot of suppliers. The only problem is that the chips are bare minimum $5.00 a piece. The SN751518 I managed to get a quote for $1.65, but every other chip is upwards of $5.00. I'll post a comprehensive list of findings on the vintage computer federation forum when I'm done repairing these screens, RUclips keeps deleting my comments for posting links.
A few things to note: horizontal chips almost never go bad, I only have two screens that have dead horizontal lines, and it's only one chip on those. The plastic frame ones usually have more dead chips compared to an aluminum frame screen. Aluminum frame screens are more likely to have severed ribbon cables because the aluminum warps and presses against the ribbon cable cutting it. The white packages can cause an entire section to go bad if one goes bad. I also don't know if any way to replace those white packages under the chips. The main thing I have learned from this repair is that if you bang your head against a brick wall enough times, it will eventually break.