I figured it was the Power Supply card, so I replaced it with another one on ebay. It wasn't, you can hear the power supply humming when powered on. Also tried replacing 5 amp fuse, has no luck. TV doesn't turn on, and has no indicator light. I heard a small pop from the TV, then it powered down and hasn't turn on since. All the capacitors look good, and the TV has been barely used since I bought it in 2011.
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Re: Philips 40" Class LCD 1080p 240Hz HDTV, 40PFL5505D/F7 no power, no indicator ligh
do you have any pics of the board? do you have a dmm? pics will help cause someone here may see something you maybe missed -
Re: Philips 40" Class LCD 1080p 240Hz HDTV, 40PFL5505D/F7 no power, no indicator ligh
DPS-320LP is that your power supply board?Comment
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Re: Philips 40" Class LCD 1080p 240Hz HDTV, 40PFL5505D/F7 no power, no indicator ligh
any pics of your board? do u have a digital multimeter? by no means am i the best at helping but i will try. it is hard to even try and help someone if you don't have a multimeter and pics are really helpful along with a schematic.Comment
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Re: Philips 40" Class LCD 1080p 240Hz HDTV, 40PFL5505D/F7 no power, no indicator ligh
I just repaired a tv with this same issue with same model number. The power supply had no 5 volt output and standby light was off. The Diode D950 on power supply was reading bad on a multi meter I replace with a new diode and now it works great.Comment
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Good day everyone.
I have on the bench an amp board from DALI SUB E-12F. It is class D amp with a smps on the same board.
The issue is that it powers off way before the rated power is reached (the protection circuit kicks in). It has an independent standby power supply, which stays on after the main power supply is turned off via a relay on the primary side (thus there is no reason to believe that the protection is triggered from the smps IC on the primary side).
The normal value of the positive and negative power rails is +/- 43V.
The positive rail stays... -
Hello,
on this laptop acer aspire v571p the led of the power indicator blinks blue for periods of 1s lighted and 3s off after switch on and this indefinitely.
i tried the hard reset, cmos reset, changing the ram without results.
in order to reach the cmos battery i disassembled the laptop and did several mesures with my multimeter.
The 19v, 5v, 3v are well established after the chip 5v-3v. the following signals : 3d3v_aux_kbc (which supplies the sio chip) and 3d3_s5 are well established also.
but the signals: 3dv3_s0, pw_slp_s3# and pw_slp_s4 oscillate at the same...11-22-2025, 03:54 PM -
Hi guys, this is general query really
So I have a Hill DX3000 3KW audio amplifier here.
It has a topology/design like a class A/B but all the banks of output transistors (10 transistors in each 'side' of the channel) are NPN.
I was wondering what class this is. It doesn't fit the description of class A.
It also doesn't match class A/B or B amplifiers as all the examples I see have a complimentary output stage desigs (NPN/PNP) and clearly is not G, H or D
I looked for 'class A push pull' but that didn't tell me anything either
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For some time, a "Class 2" HDMI cable (part number BN39-01583B) supplied with a Samsung 4K 60 Hz display sometimes causes the display to overlay a few horizontal lines of flickering pixels of random colours and sometimes drops out, particularly on content requring HDCP.
Since changing the cable to a thicker Class 2 unit, this problem has not occured again - do you know of other marginal "Class 2" HDMI cables supplied with displays?09-06-2023, 08:50 PM -
Greetings
I got an Asus X453SA for repair
Symptom : no display, with charging indicator blinking, with or without battery. Power indicator is steady. When battery plugged in, the current consumption jumps, but the charging indicator is still blinking.
Here is the measured power sequence :
+3VA_EC +3.3V
EC_RST# +3.025V
+5VSUS_ON +3.307V
PWR_SW# +2.982V
3VSUS_ON +3.307V
SUS_PWRGD +3.386V
+1.05VSUS_PWRGD +1.061V
1.8VSUS_EN +1.873V
VSUS_PWRGD +3.383V
PM_PWRBTN# +1.830V
PM_RSMRST#...
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