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From: 4poster on 22 Dec 2009 20:29

"pedro" <me(a)home.net> wrote in message
news:dcn2j5tarhjqu58o68vmse8u0dhbp68ntu(a)4ax.com...
> On Mon, 21 Dec 2009 23:11:04 -0500, Christopher Muto
> <muto(a)worldnet.att.net> wrote:
>
>>4poster wrote:
>>> "Christopher Muto" <muto(a)worldnet.att.net> wrote in message
>>> news:GIGdnZyeDJgGm63WnZ2dnUVZ_tadnZ2d(a)speakeasy.net...
>>>> 4poster wrote:
>>>>> My Display started acting strange and gradually
>>>>> ended with it appearing on bootup, or if I power cycled
>>>>> and then would blank out.
>>>>>
>>>>> I was told it could be the power options in Control Panel,
>>>>> which permanently set the monitor in power saver mode,
>>>>> and if I selected "never" for the monitor the PC would reset the
>>>>> monitor
>>>>> hibernate control.
>>>>>
>>>>> My power options function is corrupted and there are no schemes in
>>>>> that
>>>>> panel. System Restore didn't help, so I had a HP Pc where the power
>>>>> option was functional and I interfaced the monitor to that PC with the
>>>>> power saver set to "never" for the monitor and that didn't help.
>>>>>
>>>>> Attempts to get help from Dell were maddening. They run you around in
>>>>> circles and when they give you a chance to email them, for some reason
>>>>> you never get the chance.
>>>> it sounds like you are affected by a very common problem that the dell
>>>> e152fp/e153fp/e172fp/e173fp(b) all have. a set of transistors fail in
>>>> them and that often also takes out a fuse along the way. i would
>>>> suggest
>>>> you confirm that your computer is not the problem by attaching a known
>>>> working monitor to your computer. then also try putting your
>>>> questionable
>>>> monitor on a known working computer. once you have confirmed that the
>>>> computer is fine and that the monitor is the problem then you can
>>>> either
>>>> repair your monitor or buy a new one. it is very economical to repair
>>>> your monitor yourself provide you have the skills. but it is not
>>>> economical to have your monitor repaired by a shop - it would be
>>>> cheaper
>>>> to purchase new. a new monitor can be had for as little as $100 and
>>>> would
>>>> be larger than what you currently have.
>>>> but if you are handy with a soldering iron and you like a challenge
>>>> like
>>>> this then you can easily get the repair parts that you need from a
>>>> number
>>>> of sellers on ebay. the parts cost only about $5. however the labor
>>>> involved is considerable. it take 20-30 minutes to completely
>>>> disassemble
>>>> the monitor and remove the electronics board. then you have to solder
>>>> in
>>>> the new parts, and finally reassemble the monitor. you can find videos
>>>> on
>>>> youtube that show you how to open the monitor if you need instructions.
>>>> good luck.
>>>> 17" lcd monitor for $109 delivered...
>>>> http://www.newegg.com/Product/Product.aspx?Item=N82E16824009185
>>>> craigslist is also a good bet, but i would avoid the models mentioned
>>>> above for this very reason.
>>>
>>> Thanks Christopher,
>>>
>>> I have a new 18" Acer attached to my PC and it's fine.
>>> I also hooked up the Dell monitor to a good working HP PC,
>>> so I pretty well narrowed it down to the display. BTW, the Acer was only
>>> $85
>>> at Staples, with an extended warranty for $5, but I can change xistors
>>> or
>>> even chips, as I have been a tech for forty years, so that's not an
>>> issue,
>>> but I do like to locate service literature if possible.
>>>
>>> I saw another post about restoring the OEM operating system by accessing
>>> the
>>> boot menu, but when I tried there wan no option available. Any help on
>>> that?
>>>
>>>
>>
>>if you can't gain access to the dell recovery partition then it is
>>probably not there. it is very common for optiplex to come with a
>>software image as provided by the buyer, particulary in large
>>corporations or educational settings. these builds do not usually have
>>a recovery partition from the start. on other machines the partition is
>>lost if the machine has the software reloaded from scratch or in the
>>event of hard drive failure when it is replaced with a blank drive that
>>is then rebuilt from scratch (the most common issue).
>>
>>i don't have a schematic of the dell monitors. in fact i have never
>>seen them. but if you take a look at ebay item number 220488756040 and
>>you will not only see the parts you need but also where they are on the
>>circuit board...
>>2SC5707 Transistors (quantity of 4)
>>FU9024N Transistors (quanity of 2)
>>BEL 125V 3 Amp MS Fuse (quanity of 1)
>>http://i699.photobucket.com/albums/vv356/weefa/BENQ-INVERTER.png
>>when you open it also check the capacitors for buldging. i don't think
>>the e153fb had the capacitor problem but it is worth checking them once
>>you are in there. the dell ultrasharps have issues with the capacitors.
>
> I repair LCD monitors.
>
> <tutorial mode>
>
> Broadly there are two classes of failures, each with characteristic
> symptoms.
>
> Primarypower supply - no picture at all, often the power on lamp will
> flash at ~ once/sec, with sometimes an audible click. This is the
> SMPS shutting down and attempting to restart repeatedly. Cause -
> failed electrolytic caps in the switcher. Inspection will show
> bulging/vented and/or leaking caps. If no signs of electrolyte
> leakage, replace all the larger electrolytics (usually four or five
> 330/470/1000uF) with 105C low-ESR types of a known good brand.
>
> Backlight inverter - on powerup an image may appear briefly then
> disappear, but visible if the screen is externally illuminated (eg
> with a flashlight). Usual cause is failure of at least one of the
> pair of bipolar transistors driving one of the two CFL backlights.
> Typically this causes failure of the series pass FET used for
> brightness control, and often takes out a fuse which protects the
> inverter system after the main PSU section.
>
> The symptoms reported certainly match this. The 2SC5707 is actually a
> fairly high-spec device, and substitution is NOT recommended. That
> kit (with which I have no connection) contains all the parts you would
> generally need for repairing an inverter failure on a monitor which
> uses those parts - not all manufacturers do of course, so I would
> suggest the O/P open the monitor and check before ordering.
>
> </tutorial mode>

Thanks, Pedro

Very kind of you. I did get a great Acer monitor at Staples for $85, so if I
do troubleshoot the Dell. i'll use it as a backup or shre it with a needy
relative.


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