Re: fixing a Levono/IBM 6659 PCD monitor (any idea what part 'F701' might be?)

If i remember correctly 48.L2501.A04 is made by Benq, Benq 's quality
is not very good compare to other makers.
IF the UL number of your IBM monitor is E144906, then i am 100% sure it
is a Benq one.
Since the fuse blow again, i think the problem is at the primary side
of the board(before AC convert to DC)
I guess you can check whether there is a cold solder join at the
primary side of the board, And also look at the capacitor and
transistor and see if they got damage or not.

grindlay@xxxxxxxxx wrote:
Thanks, the fuse was indeed blown. However, after replacing it, I'm
back to where I started with this odd behavior of powering up only half
the time. This occurs even when the monitor has been sitting
undisturbed, so I don't think its a loose connection. In fact, it
almost seems as though the problem only occurs after the monitor has
been plugged in for a while (maybe 30 mins), but this might be
coincidental.

I'm pretty sure the problem is somewhere on the '48.L2501.A04' board;
not very specific I know. Is anyone familiar with this or similar
monitors? Any ideas as to what parts I should look at replacing? Any
idea where a schematic could be found?

thanks again,
Graham

meow2222@xxxxxxxxx wrote:
grindlay@xxxxxxxxx wrote:

Hi all,

I'm trying to fix a 6659 monitor which is showing some odd symptoms.
When I got the monitor it would power up roughly 50% of the time. The
other 50%, pushing the power button did nothing. I suspected that it
might just be an issue with the power plug socket on the monitor, so I
opened up the case. Unfortunately, while probing around with it
plugged in, I must have shorted something since I soon got a whiff of
fried component and the monitor now powers up 0% of the time.

Visual (and olfactory) inspection have led me to suspect a surface
mount component labelled 'F701' might be the culprit. This part is
sort of translucent, possibly with a piece of wire running through it
(maybe its a fuse?). It has '4FT' printed on it. Any ideas what it
might be? Better yet, anyone have schematics for the 6659?

thanks!
Graham

Fuse, 4AT is 4Amp Time delay. But fuses dont olfact when they go, so it
sounds like something else is wrong. Freecycle might be quicker.


NT

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