hi having probs with this , the unit powers up and the screen lights up for 20sec's and then powers down again , and the psu 17PW01-4 buzz's any ideas with this issue common i seen, cant see any badcaps on the board.
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Re: technika 42 lcd 910 power probs
Your fault is different from last guy's. Check 24V across CapXon on inverters.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. -
Re: technika 42 lcd 910 power probs
is you multi meter auto ranging or manual can you post pictures of the boards on your set they we can point out for you the test points etc.Comment
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Re: technika 42 lcd 910 power probs
put you meter on diode test and the three diodes you have highlighted should have a reading in one direction only if any read odd you will have to unsolder 1 leg on each diode and then retest them.
tom will explain what he needs tested and how ie meter setting etc if your not sure.
if your not sure of the meter settings post a picture up and we will highlight the diode and dc settings for youLast edited by vinceroger69; 02-22-2013, 05:12 AM.Comment
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Re: technika 42 lcd 910 power probs
This pic: https://www.badcaps.net/forum/attach...8&d=1361530364
Two brown caps (cylinders) on inverter board: check voltage across them.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.Comment
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Re: technika 42 lcd 910 power probs
hi all thanks for quick replys ok
the diodes i get the same for all 3 a reading of 127-130
and the voltages accross the brown caps one reads 24v and the other only 5v the t.v slips back into standby, the caps look like they have been changed before lots of flux resin and moody solder joints.
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Re: technika 42 lcd 910 power probs
ok got 24v from both brown capshi all thanks for quick replys ok
the diodes i get the same for all 3 a reading of 127-130
and the voltages accross the brown caps one reads 24v and the other only 5v the t.v slips back into standby, the caps look like they have been changed before lots of flux resin and moody solder joints.
of them on the invertor boards before she shuts down .Comment
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Re: technika 42 lcd 910 power probs
Ah, so you get 24V, then it rapidly falls off? When it does this, does the power LED begin blinking?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.Comment
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Re: technika 42 lcd 910 power probs
Do you have 24V on those caps briefly when power is first applied to the set?
What brand and series of capacitors did you use?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.Comment
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Re: technika 42 lcd 910 power probs
You need to use low-esr capacitors. Farnell sell them as do RS. Capacitors from the average shop can cause lots of issues. Good capacitors to use are Panasonic FC, FM or FR.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.Comment
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Hello all,
I'm stumped on this guy, so wanted to see if anyone has any further ideas:
Intro:
This is an Acer Nitro 5 AN515-55-55M1 with unknown prior history (bought "as-is" on eBay). It charges the battery and powers on from both AC adapter and battery, so I think this rules out main power issues.
Upon attempt to boot, it will "reboot" (meaning powers down and then powers on again) only once, and then stays stuck in a status of lights on / no post / no monitor. Powering on with fn+esc maxes out the fans on first boot attempt,... -
Powers on as normal shows an image then powers off after 10 seconds
I have to unplug it from the wall and replug to get it to turn back on but then shuts off
No blown caps
I searched for this model but nothing comes up...11-29-2024, 11:21 PM -
Hi,
I am new to this forum and have searched for some answers with problems similar to mine.
Philips TV powers on as normal for about a minute or less then click and no power at all not even standby light. If i disconnect from mains and reconnect it will power on again but for a shorter time. Once i leave it disconnected from main for a longer time it will power on for a longer period the next time.
It sounds like a power supply issue?
I have the board out and want to run some tests. Not sure what i should be doing but i put a 1k resistor across SB and +5v... -
I replaced the backlights all good. Two months later set was dead, had a shorted D9100, replaced all good again.
Now months later set powers up,backlights light ok,no picture. 12volts missing from fuse on tcon. 12VA on power
supply is 19 volts. Changed D9100 again, same, 12 volts measures 19. Am I looking at a power supply or mainboard
issue. Set will power up with remote but not power off.... -
hello friends, I have a DELL LATITUDE 5420---MODEL P137G, ST 20TFKN3 LA-K491P REV:2.0 (A01) and its quite a challenge. It powers on with the battery disconnected, lasts on for about 15 secs, and then shuts off. It does the same with battery only (no adapter). With battery and adapter it sometimes starts after hitting the button several times. It displays nothing in every case. Since only the Boardview is available, I guided myself with schematics similar to this laptop (I'll add them down).Some measurements:
1- After receiving power SIO_SLP_S0# goes high and never changes.
2-every...07-03-2025, 09:20 AM
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