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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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TFT backlight
Hi there, I have two 15" TFT screens here that need something done to their backlight. Before I start looking at them I thought that someone out there must have seen the same symptoms and perhaps can save me some time...? The first one is a Compaq TFT5000 screen. On this the backlight is stuck at full all the time. The second one is a Samsung Syncmaster 531TFT. This turns on the backlight normally but after about 1 sec it goes off. Operating the power button will repeat the sequence. Any hints? Circuit diagrams? -- Dag Nygren email: Oy Espoon NewTech Ab phone: +358 9 8024910 Träsktorpet 3 fax: +358 9 8024916 02360 ESBO Mobile: +358 400 426312 FINLAND |
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TFT backlight
Diagrams will be unavailable from the manufactures. They will service
their products, but will not sell spare parts or service information. The fault in the first one is either with the inverter that drives the backlight, or a control circuit that drives it. The second one can be the backlight, or the inverter is failing. As the story goes, in the service departments they will try to the parts to troubleshoot them. -- Greetings, Jerry Greenberg GLG Technologies GLG ============================================== WebPage http://www.zoom-one.com Electronics http://www.zoom-one.com/electron.htm Instruments http://www.zoom-one.com/glgtech.htm ============================================== "Dag Nygren" wrote in message ... Hi there, I have two 15" TFT screens here that need something done to their backlight. Before I start looking at them I thought that someone out there must have seen the same symptoms and perhaps can save me some time...? The first one is a Compaq TFT5000 screen. On this the backlight is stuck at full all the time. The second one is a Samsung Syncmaster 531TFT. This turns on the backlight normally but after about 1 sec it goes off. Operating the power button will repeat the sequence. Any hints? Circuit diagrams? -- Dag Nygren email: Oy Espoon NewTech Ab phone: +358 9 8024910 Träsktorpet 3 fax: +358 9 8024916 02360 ESBO Mobile: +358 400 426312 FINLAND |
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