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I can help you test your power suppy for the Astar LTV-32ASB and try to repair it. But if you know the defective power for sure then I know where to get this original Astar power board. I worked in Astar Company as an electronics technician before till they are clossing down and I know all model of the Astar TV.
Please call me 323-767-6030 I will go through the trouble shotting, with you.
Fixing the internal power no problem depending the power board it's burn or not. second thing is your LTV-32HBG TV with one HDMI connection or two HDMI connection? I know more about these Astar TV because I have work for the Astar co as an electronic technician before and I only give out such information how to repair these tv. so, call 323-767-6030 and I will help you go through with you problem by the phone.
Go to www.http://lcdpayless.com/ . They will make any power adapter for you for about $30.00. I have to replace my Astar LTV-2001 power adapter. Just fill out an information form including the voltage, amp and want model, and put in $30.00 as what you would want to pay. They will email you back to tell you to pay and they will ship it to you right away. Very good service.
I just finished replacing all 25 or so of the electrolytic capacitors on the power supply board of an LTV 2701 AStar TV. When I got done, the tv came back to life and WORKS GREAT. Every last electrolytic was either leaking onto the board or puffed up or both. The main problem is that Astar designed the case so that no air can circulate over the board and the capacitors bake after a couple of years. If you don't do somethig to let the air circulate, you will be replacing them again in 2 more years. The board is pretty sturdy however and its fairly easy to replace them all with some copper desoldering braid and a 125 watt soldering gun. Just be sure to keep the polarities right on the electrolytics and make sure that they are the 105C variety. Good luck and remember to add some fans and cut some extra holes in the cage.