Dell W2600 lcd TV fault

[netdent]

Re: Dell W2600 lcd TV fault

Sorry PlainBill, pwr_stb is connected to D704 then onto Q706 which I think is a ZWA16? but very hard to read, one thing I did notice most of the solder joints on the connector socked are cracked!!! this may have happened when the plug was removed as it was tight but maybe not will reflow and retest

thanks Ronnie

[netdent]

Re: Dell W2600 lcd TV fault

Ok I resoldered the socked, thought it was fixed, switched on 3 times in a row, the failed again!!

[netdent]

Re: Dell W2600 lcd TV fault

Have found this post whilst searching the power on issue?

I realize this post is probably late now but I did come accross one of these Dell little Jewels a couple of weeks ago. After reviewing the problems everyone has had with these I have found the problem that is the fix to this issue. It is not the power supply at all. Leave it alone. The problem can be found on the logic main board. I have seen a post that it is the memory chip located at I232 but that is not the problem either and if it was most people would not be able to replace it anyway because the part is surface bond mounted which means it is not to be removed. the problem is with the LM1117 800mA Low-Dropout Linear Voltage Regulators. There are two of them located close to the main power connector and one more is located on the lower right hand area of the board. These are fine tuned and if they malfuction due to heat then they will send a signal to the power supply to shut down. They have a thermal sensor in them. The part can be replaced with several others but should be replaced with the 2.5v chip. The older the monitor has become before this problem occures may result in damage to memory chip located at I232 which will of course make these monitors trash. After all three are replaced on the locic board with exact same brand and part; you will find two small reset buttons loacted in the middle of the main logic board and those should be reset by pushing them both at the same time after power is reapplied to the unit just to reset any errors that were recorded before unit would not power on or shut off after 10 seconds. The unit is not going into standby mode; it is going into shutoff lock mode. Changing only one of these parts out will only result in the problem occuring later; ussally in 45 to 60 minutes after unit is up and running. It will either shut off or stay on but lock up and do nothing. I hope this helps someone who never gave up. Dell will not fix this problem because of the time involved. Time wise it is too expensive. Lite on made the boards inside and Samsung supplied alot of the components. It is not all Dells fault but they could have been more proactive in helping us figure out the problem.

[Wizard]

Re: Dell W2600 lcd TV fault

Do not bother with this tv. Check the power on command line that turns power supply on. If it does not change when power button is pushed then board is junk. That is far, far common failure on the mainboard and cannot be repaired and capacitors are not the issue! Funny thing on PSU many of them light green are 125C. I have one too. And LCD resolution is not standard also.
1280x768. Google "W2600 no power"

Cheers, Wizard

[netdent]

Re: Dell W2600 lcd TV fault

Hi Wizard thanks for your reply, thing is, this TV does switch on most times and work perfect once on, makes me think could be repaired, have ordered those regulators as last ditch attempt

thanks Ronnie

[netdent]

Re: Dell W2600 lcd TV fault

Oh well! replaced the 3 regulators no change, I managed to buy another set on Ebay with a backlight fault for £26 + £8 shipping, will see what can be done when that one gets here, at least I might be able to verify which board the fault lies with

Ronnie

[golemmaster]

Re: Dell W2600 lcd TV fault

My brother has the same TV with the same symptoms. I've been poking around inside it. I'm very interested in finding out what is wrong and the fix.

[netdent]

Re: Dell W2600 lcd TV fault

My brother has the same TV with the same symptoms. I've been poking around inside it. I'm very interested in finding out what is wrong and the fix.

For me it turned out to be the logic board! replaced it from a scrap set and never looked back, been working for many weeks now

Ronnie

[dakers1]

Re: Dell W2600 lcd TV fault

If you are still looking Sen Alagic repairs these I had 2 done some time ago still ticken

plasmatech@gmail.com

[jeremiah2000x]

Re: Dell W2600 lcd TV fault

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