Question about E-Machines E17T 17" Flat Panel LCD Monitor

2 Answers

No power My E17T4 doesn't power up; no lights or anything. I opened up the unit to examine the internal power supply PCB. If the fuse is the little black cylindrical component labeled F101, it has continuity. On the PCB, 3 of the 470uf 25V capacitors are swollen at the top, as are two of the 220uf 25V capacitors, all clustered in the same area. There is an 'electrical smell' from that area, and not from others. I have a basic multitester and soldering equipment. Should I replace these capacitors and see what happens, or might there be another cause, and I'm seeing the effect?

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  • John Anderson Mar 03, 2007

    First, my apologies for hitting the wrong key on my PDA, rating your answer as irrelevant when I intended Good, the choiced below it. Let me know how to correct.
    I found another fuse & it's OK. Can't find burned spot.
    I had the unit apart & plugged in. For a moment, the 'On' button lit up when I was turning PCB. I could not duplicate this, no matter how I twisted & wiggled everything to find a loose connection.
    Where this 'power & light' PCB connects to the 'drawing logic' board, there are some voltages at the pins. I found 12v, 5v, and 1v. So the power is gettin into the board.
    What's next?

  • robles74 Jul 17, 2008

    My situation is very simple, I living in El Paso Tx, I need to know where can I buy a new power supply for my e-machines monitor. Any help will be appreciated.



    Thanks.

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Hello again, I've posted this answer from my second account by mistake (we use it for beta testing the live chat). Don't rate it to that account because I use it mostly as a boot. This is my primary account. Therefore if you have any more question, I will answer from this.

Posted on Feb 28, 2007

  • Motoi  Bogdan
    Motoi Bogdan Mar 03, 2007

    Power will get in but however the logic mainboard must give the power circuitry a signal to power on. When you've noticed that the led turned on, this signal was in some way delivred. It is hard to me to say for shure where the Power On signal is emitted from as I don't have the schematics of this monitor, and they can't be found on the internet for simple reasons of company secrets. You could try to find this by trial and error, by continuing the twisting and things like that, but there is the danger you may damage the logical board. You should try a repair at a service center as they will have it back and running in a day or so. I had a similar situation with a westing house 17 inch widescreen monitor and the problem as I found was a burned out transistor that didn't appear to have nothing rong with it. I've replaced it with another one from a video card and everything was ok. But the risks are hight if you don't know exactly what you're doing. I had nothing to loose then, no service in my area was able to do something.

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Hello. It is good that you have some knoledge of electronics. We will be able to get on further. First thing, there isn't just one fuse. F101 is the main fuse, that's right but it isn't the only one. The LCD monitor powers on throught a tiristor or relay (depends on the model) and those are controlled by the logical units (chips and black stufs with lots of connectors). However these are also protected by fuses. Smaller ones, that doesn't look like regular fuses. Check the power suply area for more fuses (labeled with F also). In some case and for some models they are some green, resistor-like components. Check them all for continuity. If there aren't any more "F's" they are noted with another code, but that is pretty rare. The swollen capacitors aren't broken. They swell over time and they dry, loosing some of their capacity but they are most probably still ok. Your first thing to do would be the fuse check-up. Also, check the logical unit area for burned out components eventualy by using a magnifying glass.If some of those chips or transistors or anything are broken,burned or anything else, you will require a service center to have it fix. They burn out because something else has failed or was damaged before them, resulting in some sort of chain reaction. So, first thing. Check fuses and for broken components. :) Also, feel free to ask further questions and always remember to rate any answer received from this site :).

Posted on Feb 28, 2007

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Here are steps that may help you fixing the problem. You should prepare tools and multimeter.

I'm assuming that your unit is dead set without an standby LED light and your outlet is live.1.Power cord - check the cord it might be opened (no continuity).This is due to frequent bending,pulling. 2. Power switch - check for dry joints, open contact. 3.Check the internal fuse- sometimes the fuse fail because of the power surge, replacing with new one will cure the problem, If this is the case I've advice you to use surge protector/AVR (Automatic Voltage Regulator). However if the fuse blew again this is an indication that you have a shorted parts on the power supply, you may visit the linkhttp://www.fixya.com/support/r8053361-fuse_keeps_blowing for more info. If no reaction and still the unit didn't power up then you have an open parts on the power supply.

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The next steps should be done by an expert or qualified technician because isolating the problem on the power supply is quite technical.

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The next steps should be done by an expert or qualified technician because isolating the problem on the power supply is quite technical.

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