Having problems with your Sceptre X9G-NagaIV 19" LCD Monitor ?

LCD goes black after few minutes

\015 My friend has a Sceptre X9G NAGAV monitor and after a few minutes it goes black, but the monitor and computer are both still on. It will load and everything, but if you go to open up a program it will go black. She sent it to a professional to get fixed for a different problem, and this problem started soon after. She came to me because she didn't want to pay more money to have it fixed again. At first I thought it was a virus so I ran AVG but it didn't turn anything up. Her computer is a Compaq that was custom built, and she's using windows xp. All previous monitors have worked fine, and this monitor works perfectly on other computers.I have never encountered this problem before and I don't know what to do to help her.\015

Answers :

I would suspect the capacitors on the power supply board. Other sites show that power up problems are due to the aluminum electrolytic capacitors on the power supply board being defective. Replacing the four 470uf 25v capacitors (470 micro farad, 25 volt) on the board usually fixes the problem. Sometimes also the two 1200uf 25v capacitors could be the culprit. I suggest changing them all. The price is about $7 for the parts online at Mouser electronics plus $7 shipping. I just fixed mine. I bought two 1200uf 35v capacitors, Mouser part number: 647-UPJ1V122MHD6 and four 470uf 25v capacitors Mouser part number: 661-EKY250ELL471MH2 These are slightly larger than the originals but still fit and they were in stock. You will then have to open the unit (relatively easy) remove the power supply board by removing four screws and disconnecting the connectors (Make a note of wire colors and where the connectors came from before removing). Then you will need to remove the old parts by desoldering them and then solder in the new parts (somewhat easy if you have soldered before)
Repair Help & Product Troubleshooting for Sceptre X9G-NagaIV 19" LCD Monitor

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