working on this set for a friend, psu seems to have all its voltage, no front led, no visual signs of burned anything on the boards, has all 24v 12v 5v ps-on is 2.8v no standby led at all is this maybe a mainboard? I uploaded a schematic will try get pics soon. I take it these sanyos are junk from the get go as I have 3 them same symptoms thanks for looking
-
-
Re: Sanyo DP42840 P42840-05 set wont turn on
if I unplug 5pin connector K8L on the anolog board that's connected to mainboard, the backlights come on if that helps any -
Re: Sanyo DP42840 P42840-05 set wont turn on
That means the inverter and the power supply is OK.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=24809Comment
-
Re: Sanyo DP42840 P42840-05 set wont turn on
with everything connected is it poss to force the set on? like gnd/ps-on? thx budmComment
-
Re: Sanyo DP42840 P42840-05 set wont turn on
You need to remove the PS-ON wire first before using the resistor (330~1K Ohms) between PS-ON and 5VSTBY to force on the power supply.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=24809Comment
-
Re: Sanyo DP42840 P42840-05 set wont turn on
umm... you got PSon though...Comment
-
Re: Sanyo DP42840 P42840-05 set wont turn on
I read somewhere before some these sets get in the stuck on position?Comment
-
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=24809Comment
-
Re: Sanyo DP42840 P42840-05 set wont turn on
so its already on?Comment
-
Re: Sanyo DP42840 P42840-05 set wont turn on
The DP42840 Sanyo series have main board problems and new boards aren't available. Some kits are available (check ebay) but the smd IC's are difficult or impossible to replace without the right equipment. Problems are usually related to data corruption on IC5750 but other components can be bad too.Comment
-
Re: Sanyo DP42840 P42840-05 set wont turn on
well thanks everyone for the postComment
-
Re: Sanyo DP42840 P42840-05 set wont turn on
mainboard problem,i had the same set ,same symptoms. fortunately it was under warranty the main was like 170. then the tv was less than a yr old.Comment
-
Re: Sanyo DP42840 P42840-05 set wont turn on
this morning I decided play with this set was very quiet and I heard a faint sound the set was on with volume turned way down no backlight and no led on front panel wtfComment
-
Re: Sanyo DP42840 P42840-05 set wont turn on
now nothing, I understand after 3 power failures this set goes into standby mode, how long till it resets itself after unplugging?Comment
-
Re: Sanyo DP42840 P42840-05 set wont turn on
Note: If power failure is detected 3 times in 15 minutes,
the set will enter the standby mode and cannot be
switched On.To reset the operating programs of the
sub_CPU it is necessary to disconnect the AC cord
for a short time.Comment
-
Re: Sanyo DP42840 P42840-05 set wont turn on
im using a mainboard out of a P42740-04 in this set has sound but once I plug main video cable nothing schematics shows same pinout for video sound is now working just no video! if I leave lcd plugged into mainboard wont come on no sound but when it is unplugged works fine I know its not right board but I think it will work something else is wrong somewhereComment
-
Hello everyone,
Inside the console there is a small circuit board (see photo) that contains the main power switch, the one on the front.
This circuit board connects to a 10-pin flat cable called NEXUS that terminates on the motherboard.
This NEXUS connector broke.
Can anyone tell me, while waiting for a replacement, if it's possible to turn on the Xbox by disconnecting this circuit board and making some modifications (like adding a small power button) on the motherboard?
The Xbox has a power supply that provides 12 volts on all outputs, so the power... -
Hello, i have some issues with my laptop Lenovo Y700-17ISK (motherboard BY511 NM-A541), it started when i turn on the laptop, but the lcd wont turn on, i then connected it via hdmi to tv and screen was ok. So i thought maybe lcd stripe is faulty, i removed the bottom cover, disconnected main battery, reset the cmos by disconnecting battery for 1 min, then slighty move the lcd stripe. Conncted power supply and tuned on my laptop, the lcd turn on, it started to load os, then it turn off, after a second it turn on, then after like 3 seconds turn off again, and so on. Removed power supply, waited... -
To all the members here...
Let me tell you a little bit about what happened to my laptop (MSI GF63 THIN 11UCX model: MS-16R6) that “maybe” you know how to solve this problem.
So before this problem happened, my laptop was running smoothly. When I wanted to restart my laptop, it looked fine at first. But after I waited for this restart process to take a long time, until finally I panicked (because the restart process did not finish plus the laptop screen only showed a black screen), I immediately pressed and held the power button to force the laptop to turn off. But... -
Hello, I have an Acer Aspire 4520 from a couple of decades ago and I want to repair it solely for nostalgia.
It happens that when I turn it on after having been disconnected for a long time, it turns on without problems, it tells me that the BIOS has been reset and that it will load the factory settings, if I tell it to continue, the computer turns on and everything works fine.
The moment I turn it off and want to turn it back on a second time, or restart it and try to start it again, it no longer gives an image, and it no longer responds.
If I remove the... -
Hi everyone,
I am dealing with the problem of turning on and off my Dell e7470 notebook.
The battery charge light is solid white, I press the button, the power indicator and the light on the button are solid for 1-2 seconds and immediately turn off.
The system does not turn on, there is no post.
I removed the RAMs and changed them, changed the battery, RTC battery, AC adapter, removed them and waited, tried again, it does not turn on.
The problem continues in the same way.
I tried to turn on the Fn key, nothing came to the screen....
Comment