Re: HP 1955 Monitor Repair Guide
Hello, I've known of this forum for a while but never browsed or posted on it, but now I have an excuse to.
I also have a HP 1955 monitor, that I got because it had been thrown away, but my problem seems to be a little bit different. Even though the monitor will power on and display an image, the backlight does not come on at all. Which I think would indicate that the fuse is open.
The fuse is a bel brand fuse and is rated for 2.5A 250VAC, I think this is because I'm in Britain where we use a 240VAC 50Hz electrical system.
I looked at the components and found a C5707 that looked as if it had a small hole blown in it. I do not own any test equipment so I couldn't check the resistors, capacitors etc. to see if they were out of tolerence.
I also looked at the solder joints on the underside of the PCB and some of them don't look exactly right, for example the solder joints on the IEC power socket are loose. And the grey capacitors feel loose. I couldn't reflow or touch up any of the joints as I don't own a soldering iron.
I mentioned above that I don't own any of the proper equipment that should be used to repair this power supply board. The point of this post is to get some good feedback on what might be wrong with this and ultimately the goal is to possibly take the board to a professional to have it repaired.
I am new to repairing electronics in this way, so forgive me if I'm not being detailed enough.
Thank you in advance for any feedback.
George
Hello, I've known of this forum for a while but never browsed or posted on it, but now I have an excuse to.
I also have a HP 1955 monitor, that I got because it had been thrown away, but my problem seems to be a little bit different. Even though the monitor will power on and display an image, the backlight does not come on at all. Which I think would indicate that the fuse is open.
The fuse is a bel brand fuse and is rated for 2.5A 250VAC, I think this is because I'm in Britain where we use a 240VAC 50Hz electrical system.
I looked at the components and found a C5707 that looked as if it had a small hole blown in it. I do not own any test equipment so I couldn't check the resistors, capacitors etc. to see if they were out of tolerence.
I also looked at the solder joints on the underside of the PCB and some of them don't look exactly right, for example the solder joints on the IEC power socket are loose. And the grey capacitors feel loose. I couldn't reflow or touch up any of the joints as I don't own a soldering iron.
I mentioned above that I don't own any of the proper equipment that should be used to repair this power supply board. The point of this post is to get some good feedback on what might be wrong with this and ultimately the goal is to possibly take the board to a professional to have it repaired.
I am new to repairing electronics in this way, so forgive me if I'm not being detailed enough.
Thank you in advance for any feedback.
George
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