brothers, what you see in the picture is a dismantled hanspree hsg1075 28inch lcd monitor. As you can see I have removed all covers on the back. This monitor only displays white when powered on, sound works perfectly fine. No splash logo displays, just bright white. Any direction on which board is bad and needs replaced? Somewhat proficient PC tech here (not TV). No apparent damage to any boards, no loose connections.
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Hanspree HSG1075
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Re: Hanspree HSG1075
At the bottom of the [picture there is a metal plate over the Tcon.
Can you post a really clear picture of the Tcon board.Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740
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Re: Hanspree HSG1075
Yes, that is the T-con board.
There is a device marked "M" and nearby "F100". This is the fuse. Measure the voltage on both ends of the device, relative to the chassis.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: Hanspree HSG1075
You need to check the voltage on the fuse with the TV POWER ON (hit the power switch), black on the metal chassis, red probe on each end of the fuse at a time.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
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Re: Hanspree HSG1075
DCV 20V.
You are measuring the low voltage side. Shocks are not possible at the low voltages the t-con and video processor uses. The highest voltage on the t-con is 30V DC. The SELV level (safety extra-low voltage) specification is 60V DC. I have a 35V DC power supply. I can touch the output (and regularly do) with sweaty or dry hands and am not electrocuted yet.
However, do not touch any of the heatsinks (metal plates) on the power supply, as they can easily give a very nasty shock.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: Hanspree HSG1075
OK, just to be sure, can you find a fresh 1.5V battery and test that? It should show around 1.55~1.6V if good. Just to check if meter is OK.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: Hanspree HSG1075
OK, must be slightly discharged but that is fine.
So some how power is not getting to the T-con.
Can we have a closer image around the connector which goes to the T-con but on the main board side?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: Hanspree HSG1075
In this picture,
https://www.badcaps.net/forum/attach...0&d=1356560428
Do you see the grey device marked 4R7?
Can you test the output voltage here relative to the chassis of the TV?
Also, let's make sure the chassis test is good; I just have a feeling. Set your meter to 200 ohms. Probe from the metal shield of the connector on the main board to the chassis of the TV -- you should see under 3 ohms.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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