Hi,
I am trying to repair a dell Model # 1504FP monitor.
Observations:
1) power on the monitor and led-power-on light turns yellow. Then it turns green. But there is no image displayed on the screen.
2) With power-on led green i shined a flash light on the screen and you can see a faint image.
I took the monitor apart and there is nothing obviously wrong from a visual perspective (see pics of main board and inverter board).
I tested each of bulbs using a spare monitor to drive the bulbs.........ALL bulbs in the 1504FP are OK.
I put the monitor back together enough so i could power on the monitor and measure some voltages. I never actually measured anything because i found that device MTP2955V was getting hot.......see enclosed pic. I noticed that under this device there is some of that "glue" stuff that is supposed to kind yellowish in color i guess to hold devices in place. Anyway, i noticed that the glue stuff underthis device was more "brownish" in color........like it had gotten hot. Rate at which this device gets hot is not that fast but over about 1 to 2 min its almost too hot to touch with finger and it appears to increase in temp the longer its on.
I kept turning monitor off, to let MTP2955V cool, and then back on to see if any other devices were getting hot. As far as i can tell its the only one getting hot.
At somepoint during all of this on and off business the monitor decided to start working! I know this is monitor is still bad and needs fixing but thought this might be a clue.
Questions:
1) How to tell if device MTP2955V (its an ON semiconductor device) is bad?
2) MTP2955V is getting hot........should i replace this?
3) What voltages can i check to help determine location of the problem?
Any inputs you can give would be appreciated.
I am trying to repair a dell Model # 1504FP monitor.
Observations:
1) power on the monitor and led-power-on light turns yellow. Then it turns green. But there is no image displayed on the screen.
2) With power-on led green i shined a flash light on the screen and you can see a faint image.
I took the monitor apart and there is nothing obviously wrong from a visual perspective (see pics of main board and inverter board).
I tested each of bulbs using a spare monitor to drive the bulbs.........ALL bulbs in the 1504FP are OK.
I put the monitor back together enough so i could power on the monitor and measure some voltages. I never actually measured anything because i found that device MTP2955V was getting hot.......see enclosed pic. I noticed that under this device there is some of that "glue" stuff that is supposed to kind yellowish in color i guess to hold devices in place. Anyway, i noticed that the glue stuff underthis device was more "brownish" in color........like it had gotten hot. Rate at which this device gets hot is not that fast but over about 1 to 2 min its almost too hot to touch with finger and it appears to increase in temp the longer its on.
I kept turning monitor off, to let MTP2955V cool, and then back on to see if any other devices were getting hot. As far as i can tell its the only one getting hot.
At somepoint during all of this on and off business the monitor decided to start working! I know this is monitor is still bad and needs fixing but thought this might be a clue.
Questions:
1) How to tell if device MTP2955V (its an ON semiconductor device) is bad?
2) MTP2955V is getting hot........should i replace this?
3) What voltages can i check to help determine location of the problem?
Any inputs you can give would be appreciated.
Attached Files
if you find these attachements useful please consider making a small donation to the site
) I come here and problem gets resolved in a few minutes!!..thanks badcaps!!
But today, I’m making an exception here. Why? No idea. Perhaps only because the repair details are still “fresh” in my head… which is ironic, given this is a 16 year old monitor that hardly anyone will care about today. It is new to me, though.
Comment