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Disappearance LCD lights in Samsung R40 Plus
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TOPIC: Disappearance LCD lights in Samsung R40 Plus
#63
Jonny
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graphgraph
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Disappearance LCD lights in Samsung R40 Plus 6 Years, 12 Months ago Karma: 0
Good all the time of day. Tell me how to solve this problem here ...
Lighting of LCD mainly appears briefly at the greeting BIOS startup laptop (1-2 seconds) and disappears at the same laptop works fine. Occasionally, breaking the booting (Break) I can avoid to switch off the LCD lamp, and sometimes in the BIOS this lamp also worked ... It seems to be a correlation with the position and mechanical deformations of the caps (screen).
Model laptop on the back cover is Samsung R40 Plus NP-R40XY06/SEK.
PWM OZ9910SN, on the MOSFET mark in two lines is "4604 BD7E33" (pinout/datasheet not found). At the inputs of the inverter
VIN - 10V (from Accum) 18V (from network);
PWM - 0,85 V (not reg. because the problem of keyboard);
VEN - 3,2 V.
The output of the inverter (in the primary) when the lamp lights - meander scale ~VIN (supposedly - are rarely able to catch).
Questions is:
- How to check whether the inverter;
- How to check the lamp itself (I don't have the other inverter)
- What else can you see ...?
Thanks in advance.
 
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#64
igorx1972
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Re:Disappearance LCD lights in Samsung R40 Plus 6 Years, 12 Months ago Karma: 0
4604 BD7E33" (pinout/datasheet not found)
www.aosmd.com/pdfs/datasheet/AO4604.pdf
 
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